diff --git a/packages/vuetify/src/components/VApp/VApp.tsx b/packages/vuetify/src/components/VApp/VApp.tsx
index fdbb9870bc9..063152fc1f7 100644
--- a/packages/vuetify/src/components/VApp/VApp.tsx
+++ b/packages/vuetify/src/components/VApp/VApp.tsx
@@ -8,6 +8,7 @@ import { useRtl } from '@/composables/locale'
 import { makeThemeProps, provideTheme } from '@/composables/theme'
 
 // Utilities
+import { Suspense } from 'vue'
 import { genericComponent, propsFactory, useRender } from '@/util'
 
 export const makeVAppProps = propsFactory({
@@ -41,7 +42,11 @@ export const VApp = genericComponent()({
         ]}
       >
         <div class="v-application__wrap">
-          { slots.default?.() }
+          <Suspense>
+            <>
+              { slots.default?.() }
+            </>
+          </Suspense>
         </div>
       </div>
     ))
diff --git a/packages/vuetify/src/components/VAppBar/VAppBar.tsx b/packages/vuetify/src/components/VAppBar/VAppBar.tsx
index ab1fcd0842b..1fe67bdfa5e 100644
--- a/packages/vuetify/src/components/VAppBar/VAppBar.tsx
+++ b/packages/vuetify/src/components/VAppBar/VAppBar.tsx
@@ -99,10 +99,8 @@ export const VAppBar = genericComponent<VToolbarSlots>()({
         : undefined
     ))
     const height = computed(() => {
-      if (scrollBehavior.value.hide && scrollBehavior.value.inverted) return 0
-
-      const height = vToolbarRef.value?.contentHeight ?? 0
-      const extensionHeight = vToolbarRef.value?.extensionHeight ?? 0
+      const height = Number(vToolbarRef.value?.contentHeight ?? props.height)
+      const extensionHeight = Number(vToolbarRef.value?.extensionHeight ?? 0)
 
       return (height + extensionHeight)
     })
@@ -122,7 +120,7 @@ export const VAppBar = genericComponent<VToolbarSlots>()({
     })
 
     const { ssrBootStyles } = useSsrBoot()
-    const { layoutItemStyles } = useLayoutItem({
+    const { layoutItemStyles, layoutIsReady } = useLayoutItem({
       id: props.name,
       order: computed(() => parseInt(props.order, 10)),
       position: toRef(props, 'location'),
@@ -162,7 +160,7 @@ export const VAppBar = genericComponent<VToolbarSlots>()({
       )
     })
 
-    return {}
+    return layoutIsReady
   },
 })
 
diff --git a/packages/vuetify/src/components/VBottomNavigation/VBottomNavigation.tsx b/packages/vuetify/src/components/VBottomNavigation/VBottomNavigation.tsx
index d666b124eaf..d64d0e30f4b 100644
--- a/packages/vuetify/src/components/VBottomNavigation/VBottomNavigation.tsx
+++ b/packages/vuetify/src/components/VBottomNavigation/VBottomNavigation.tsx
@@ -13,6 +13,7 @@ import { makeDensityProps, useDensity } from '@/composables/density'
 import { makeElevationProps, useElevation } from '@/composables/elevation'
 import { makeGroupProps, useGroup } from '@/composables/group'
 import { makeLayoutItemProps, useLayoutItem } from '@/composables/layout'
+import { useProxiedModel } from '@/composables/proxiedModel'
 import { makeRoundedProps, useRounded } from '@/composables/rounded'
 import { useSsrBoot } from '@/composables/ssrBoot'
 import { makeTagProps } from '@/composables/tag'
@@ -84,8 +85,8 @@ export const VBottomNavigation = genericComponent<new <T>(
       (props.density === 'comfortable' ? 8 : 0) -
       (props.density === 'compact' ? 16 : 0)
     ))
-    const isActive = toRef(props, 'active')
-    const { layoutItemStyles } = useLayoutItem({
+    const isActive = useProxiedModel(props, 'modelValue', props.modelValue)
+    const { layoutItemStyles, layoutIsReady } = useLayoutItem({
       id: props.name,
       order: computed(() => parseInt(props.order, 10)),
       position: computed(() => 'bottom'),
@@ -144,7 +145,7 @@ export const VBottomNavigation = genericComponent<new <T>(
       )
     })
 
-    return {}
+    return layoutIsReady
   },
 })
 
diff --git a/packages/vuetify/src/components/VBottomNavigation/__tests__/VBottomNavigation.spec.cy.tsx b/packages/vuetify/src/components/VBottomNavigation/__tests__/VBottomNavigation.spec.cy.tsx
index 1243c61139f..9821f1aa495 100644
--- a/packages/vuetify/src/components/VBottomNavigation/__tests__/VBottomNavigation.spec.cy.tsx
+++ b/packages/vuetify/src/components/VBottomNavigation/__tests__/VBottomNavigation.spec.cy.tsx
@@ -28,4 +28,14 @@ describe('VBottomNavigation', () => {
       .setProps({ density: 'compact' })
       .get('.v-bottom-navigation').should('have.css', 'height', '40px')
   })
+
+  it('should not be visible if modelValue is false', () => {
+    cy.mount(() => (
+      <VLayout>
+        <VBottomNavigation modelValue={ false }></VBottomNavigation>
+      </VLayout>
+    ))
+
+    cy.get('.v-bottom-navigation').should('not.be.visible')
+  })
 })
diff --git a/packages/vuetify/src/components/VFooter/VFooter.tsx b/packages/vuetify/src/components/VFooter/VFooter.tsx
index cbff729e866..3fa2347e7d9 100644
--- a/packages/vuetify/src/components/VFooter/VFooter.tsx
+++ b/packages/vuetify/src/components/VFooter/VFooter.tsx
@@ -51,7 +51,7 @@ export const VFooter = genericComponent()({
       autoHeight.value = entries[0].target.clientHeight
     })
     const height = computed(() => props.height === 'auto' ? autoHeight.value : parseInt(props.height, 10))
-    const { layoutItemStyles } = useLayoutItem({
+    const { layoutItemStyles, layoutIsReady } = useLayoutItem({
       id: props.name,
       order: computed(() => parseInt(props.order, 10)),
       position: computed(() => 'bottom'),
@@ -84,7 +84,7 @@ export const VFooter = genericComponent()({
       />
     ))
 
-    return {}
+    return props.app ? layoutIsReady : {}
   },
 })
 
diff --git a/packages/vuetify/src/components/VLayout/VLayout.tsx b/packages/vuetify/src/components/VLayout/VLayout.tsx
index fa6bc1558dd..e9467d97962 100644
--- a/packages/vuetify/src/components/VLayout/VLayout.tsx
+++ b/packages/vuetify/src/components/VLayout/VLayout.tsx
@@ -6,6 +6,7 @@ import { makeComponentProps } from '@/composables/component'
 import { createLayout, makeLayoutProps } from '@/composables/layout'
 
 // Utilities
+import { Suspense } from 'vue'
 import { genericComponent, propsFactory, useRender } from '@/util'
 
 export const makeVLayoutProps = propsFactory({
@@ -33,7 +34,11 @@ export const VLayout = genericComponent()({
           props.style,
         ]}
       >
-        { slots.default?.() }
+        <Suspense>
+          <>
+            { slots.default?.() }
+          </>
+        </Suspense>
       </div>
     ))
 
diff --git a/packages/vuetify/src/components/VLayout/VLayoutItem.tsx b/packages/vuetify/src/components/VLayout/VLayoutItem.tsx
index b42c9379dca..f7f9af525b0 100644
--- a/packages/vuetify/src/components/VLayout/VLayoutItem.tsx
+++ b/packages/vuetify/src/components/VLayout/VLayoutItem.tsx
@@ -7,7 +7,7 @@ import { makeLayoutItemProps, useLayoutItem } from '@/composables/layout'
 
 // Utilities
 import { computed, toRef } from 'vue'
-import { genericComponent, propsFactory } from '@/util'
+import { genericComponent, propsFactory, useRender } from '@/util'
 
 // Types
 import type { PropType } from 'vue'
@@ -33,7 +33,7 @@ export const VLayoutItem = genericComponent()({
   props: makeVLayoutItemProps(),
 
   setup (props, { slots }) {
-    const { layoutItemStyles } = useLayoutItem({
+    const { layoutItemStyles, layoutIsReady } = useLayoutItem({
       id: props.name,
       order: computed(() => parseInt(props.order, 10)),
       position: toRef(props, 'position'),
@@ -43,7 +43,7 @@ export const VLayoutItem = genericComponent()({
       absolute: toRef(props, 'absolute'),
     })
 
-    return () => (
+    useRender(() => (
       <div
         class={[
           'v-layout-item',
@@ -56,7 +56,9 @@ export const VLayoutItem = genericComponent()({
       >
         { slots.default?.() }
       </div>
-    )
+    ))
+
+    return layoutIsReady
   },
 })
 
diff --git a/packages/vuetify/src/components/VMain/VMain.tsx b/packages/vuetify/src/components/VMain/VMain.tsx
index cf3fc1aa799..d505e719f9a 100644
--- a/packages/vuetify/src/components/VMain/VMain.tsx
+++ b/packages/vuetify/src/components/VMain/VMain.tsx
@@ -23,7 +23,7 @@ export const VMain = genericComponent()({
   props: makeVMainProps(),
 
   setup (props, { slots }) {
-    const { mainStyles } = useLayout()
+    const { mainStyles, layoutIsReady } = useLayout()
     const { ssrBootStyles } = useSsrBoot()
 
     useRender(() => (
@@ -50,7 +50,7 @@ export const VMain = genericComponent()({
       </props.tag>
     ))
 
-    return {}
+    return layoutIsReady
   },
 })
 
diff --git a/packages/vuetify/src/components/VNavigationDrawer/VNavigationDrawer.tsx b/packages/vuetify/src/components/VNavigationDrawer/VNavigationDrawer.tsx
index 9cbde45a8b0..a6004f2f37e 100644
--- a/packages/vuetify/src/components/VNavigationDrawer/VNavigationDrawer.tsx
+++ b/packages/vuetify/src/components/VNavigationDrawer/VNavigationDrawer.tsx
@@ -22,7 +22,7 @@ import { makeThemeProps, provideTheme } from '@/composables/theme'
 import { useToggleScope } from '@/composables/toggleScope'
 
 // Utilities
-import { computed, nextTick, onBeforeMount, ref, shallowRef, toRef, Transition, watch } from 'vue'
+import { computed, nextTick, ref, shallowRef, toRef, Transition, watch } from 'vue'
 import { genericComponent, propsFactory, toPhysical, useRender } from '@/util'
 
 // Types
@@ -145,11 +145,9 @@ export const VNavigationDrawer = genericComponent<VNavigationDrawerSlots>()({
       if (val) isActive.value = true
     })
 
-    onBeforeMount(() => {
-      if (props.modelValue != null || isTemporary.value) return
-
+    if (props.modelValue == null && !isTemporary.value) {
       isActive.value = props.permanent || !mobile.value
-    })
+    }
 
     const { isDragging, dragProgress, dragStyles } = useTouch({
       isActive,
@@ -166,8 +164,7 @@ export const VNavigationDrawer = genericComponent<VNavigationDrawerSlots>()({
 
       return isDragging.value ? size * dragProgress.value : size
     })
-
-    const { layoutItemStyles, layoutItemScrimStyles } = useLayoutItem({
+    const { layoutItemStyles, layoutItemScrimStyles, layoutIsReady } = useLayoutItem({
       id: props.name,
       order: computed(() => parseInt(props.order, 10)),
       position: location,
@@ -287,9 +284,7 @@ export const VNavigationDrawer = genericComponent<VNavigationDrawerSlots>()({
       )
     })
 
-    return {
-      isStuck,
-    }
+    return layoutIsReady.then(() => ({ isStuck }))
   },
 })
 
diff --git a/packages/vuetify/src/composables/layout.ts b/packages/vuetify/src/composables/layout.ts
index 1ca78909390..f851fbb036e 100644
--- a/packages/vuetify/src/composables/layout.ts
+++ b/packages/vuetify/src/composables/layout.ts
@@ -5,16 +5,16 @@ import { useResizeObserver } from '@/composables/resizeObserver'
 import {
   computed,
   inject,
+  nextTick,
   onActivated,
   onBeforeUnmount,
   onDeactivated,
-  onMounted,
   provide,
   reactive,
   ref,
   shallowRef,
 } from 'vue'
-import { convertToUnit, findChildrenWithProvide, getCurrentInstance, getUid, propsFactory } from '@/util'
+import { convertToUnit, eagerComputed, findChildrenWithProvide, getCurrentInstance, getUid, propsFactory } from '@/util'
 
 // Types
 import type { ComponentInternalInstance, CSSProperties, InjectionKey, Prop, Ref } from 'vue'
@@ -59,6 +59,7 @@ interface LayoutProvide {
   items: Ref<LayoutItem[]>
   layoutRect: Ref<DOMRectReadOnly | undefined>
   rootZIndex: Ref<number>
+  layoutIsReady: Promise<void>
 }
 
 export const VuetifyLayoutKey: InjectionKey<LayoutProvide> = Symbol.for('vuetify:layout')
@@ -91,7 +92,10 @@ export function useLayout () {
 
   if (!layout) throw new Error('[Vuetify] Could not find injected layout')
 
+  const layoutIsReady = nextTick()
+
   return {
+    layoutIsReady,
     getLayoutItem: layout.getLayoutItem,
     mainRect: layout.mainRect,
     mainStyles: layout.mainStyles,
@@ -122,6 +126,8 @@ export function useLayoutItem (options: {
   onDeactivated(() => isKeptAlive.value = true)
   onActivated(() => isKeptAlive.value = false)
 
+  const layoutIsReady = nextTick()
+
   const {
     layoutItemStyles,
     layoutItemScrimStyles,
@@ -133,7 +139,7 @@ export function useLayoutItem (options: {
 
   onBeforeUnmount(() => layout.unregister(id))
 
-  return { layoutItemStyles, layoutRect: layout.layoutRect, layoutItemScrimStyles }
+  return { layoutItemStyles, layoutRect: layout.layoutRect, layoutItemScrimStyles, layoutIsReady }
 }
 
 const generateLayers = (
@@ -177,28 +183,7 @@ export function createLayout (props: { overlaps?: string[], fullHeight?: boolean
   const disabledTransitions = reactive(new Map<string, Ref<boolean>>())
   const { resizeRef, contentRect: layoutRect } = useResizeObserver()
 
-  const computedOverlaps = computed(() => {
-    const map = new Map<string, { position: Position, amount: number }>()
-    const overlaps = props.overlaps ?? []
-    for (const overlap of overlaps.filter(item => item.includes(':'))) {
-      const [top, bottom] = overlap.split(':')
-      if (!registered.value.includes(top) || !registered.value.includes(bottom)) continue
-
-      const topPosition = positions.get(top)
-      const bottomPosition = positions.get(bottom)
-      const topAmount = layoutSizes.get(top)
-      const bottomAmount = layoutSizes.get(bottom)
-
-      if (!topPosition || !bottomPosition || !topAmount || !bottomAmount) continue
-
-      map.set(bottom, { position: topPosition.value, amount: parseInt(topAmount.value, 10) })
-      map.set(top, { position: bottomPosition.value, amount: -parseInt(bottomAmount.value, 10) })
-    }
-
-    return map
-  })
-
-  const layers = computed(() => {
+  const layers = eagerComputed(() => {
     const uniquePriorities = [...new Set([...priorities.values()].map(p => p.value))].sort((a, b) => a - b)
     const layout = []
     for (const p of uniquePriorities) {
@@ -226,7 +211,7 @@ export function createLayout (props: { overlaps?: string[], fullHeight?: boolean
     }
   })
 
-  const items = computed(() => {
+  const items = eagerComputed(() => {
     return layers.value.slice(1).map(({ id }, index) => {
       const { layer } = layers.value[index]
       const size = layoutSizes.get(id)
@@ -247,10 +232,7 @@ export function createLayout (props: { overlaps?: string[], fullHeight?: boolean
 
   const rootVm = getCurrentInstance('createLayout')
 
-  const isMounted = shallowRef(false)
-  onMounted(() => {
-    isMounted.value = true
-  })
+  const layoutIsReady = nextTick()
 
   provide(VuetifyLayoutKey, {
     register: (
@@ -294,17 +276,12 @@ export function createLayout (props: { overlaps?: string[], fullHeight?: boolean
           ...(transitionsEnabled.value ? undefined : { transition: 'none' }),
         } as const
 
-        if (!isMounted.value) return styles
+        if (index.value < 0) throw new Error(`Layout item "${id}" is missing`)
 
         const item = items.value[index.value]
 
         if (!item) throw new Error(`[Vuetify] Could not find layout item "${id}"`)
 
-        const overlap = computedOverlaps.value.get(id)
-        if (overlap) {
-          item[overlap.position] += overlap.amount
-        }
-
         return {
           ...styles,
           height:
@@ -342,6 +319,7 @@ export function createLayout (props: { overlaps?: string[], fullHeight?: boolean
     items,
     layoutRect,
     rootZIndex,
+    layoutIsReady,
   })
 
   const layoutClasses = computed(() => [
@@ -361,6 +339,7 @@ export function createLayout (props: { overlaps?: string[], fullHeight?: boolean
     getLayoutItem,
     items,
     layoutRect,
+    layoutIsReady,
     layoutRef: resizeRef,
   }
 }
diff --git a/packages/vuetify/src/util/helpers.ts b/packages/vuetify/src/util/helpers.ts
index 3a777fd3a72..cd80daec6e6 100644
--- a/packages/vuetify/src/util/helpers.ts
+++ b/packages/vuetify/src/util/helpers.ts
@@ -1,5 +1,5 @@
 // Utilities
-import { capitalize, Comment, computed, Fragment, isVNode, reactive, toRefs, unref, watchEffect } from 'vue'
+import { capitalize, Comment, computed, Fragment, isVNode, reactive, readonly, shallowRef, toRefs, unref, watchEffect } from 'vue'
 import { IN_BROWSER } from '@/util/globals'
 
 // Types
@@ -14,6 +14,7 @@ import type {
   VNode,
   VNodeArrayChildren,
   VNodeChild,
+  WatchOptions,
 } from 'vue'
 
 export function getNestedValue (obj: any, path: (string | number)[], fallback?: any): any {
@@ -708,3 +709,16 @@ export function defer (timeout: number, cb: () => void) {
 
   return () => window.clearTimeout(timeoutId)
 }
+
+export function eagerComputed<T> (fn: () => T, options?: WatchOptions): Readonly<Ref<T>> {
+  const result = shallowRef()
+
+  watchEffect(() => {
+    result.value = fn()
+  }, {
+    flush: 'sync',
+    ...options,
+  })
+
+  return readonly(result)
+}