Delay the initial setScreen call.

src/main/java/xyz/bluspring/kilt/mixin/workarounds/early_screen_delay/MinecraftMixin.java

@@ -0,0 +1,63 @@
+package xyz.bluspring.kilt.mixin.workarounds.early_screen_delay;
+
+import com.llamalad7.mixinextras.injector.wrapoperation.Operation;
+import com.llamalad7.mixinextras.injector.wrapoperation.WrapOperation;
+import com.mojang.realmsclient.client.RealmsClient;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.gui.screens.Screen;
+import net.minecraft.client.main.GameConfig;
+import net.minecraft.server.packs.resources.ReloadInstance;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Unique;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+// Use lower priority for screen delay. This gives priority to Fabric mods,
+// allowing them to set their menu screen without interference from the Forge event.
+@Mixin(value = Minecraft.class, priority = 500)
+public class MinecraftMixin {
+
+    @Unique
+    private Runnable kilt$setScreen;
+
+    @WrapOperation(
+            method = "<init>",
+            at = @At(
+                    value = "INVOKE",
+                    target = "Lnet/minecraft/client/Minecraft;setScreen(Lnet/minecraft/client/gui/screens/Screen;)V"
+            )
+    )
+    public void kilt$delaySettingInitialBanScreen(Minecraft instance, Screen guiScreen, Operation<Void> original) {
+        kilt$setScreen = () -> original.call(instance, guiScreen);
+    }
+
+    @WrapOperation(
+            method = "<init>",
+            at = @At(
+                    value = "INVOKE",
+                    target = "Lnet/minecraft/client/Minecraft;setInitialScreen(Lcom/mojang/realmsclient/client/RealmsClient;Lnet/minecraft/server/packs/resources/ReloadInstance;Lnet/minecraft/client/main/GameConfig$QuickPlayData;)V"
+            )
+    )
+    public void kilt$delaySettingInitialScreen(
+            Minecraft instance, RealmsClient realmsClient, ReloadInstance reloadInstance,
+            GameConfig.QuickPlayData quickPlayData, Operation<Void> original
+    ) {
+        kilt$setScreen = () -> original.call(instance, realmsClient, reloadInstance, quickPlayData);
+    }
+
+    @Inject(
+            method = "method_29338",
+            at = @At(
+                    value = "INVOKE", target = "Lnet/minecraft/client/Minecraft;onGameLoadFinished()V"
+            ),
+            order = 1001 // Needs to be after forge load.
+    )
+    private void kilt$setScreenAfterLoading(CallbackInfo ci) {
+        if (kilt$setScreen != null) {
+            kilt$setScreen.run();
+            kilt$setScreen = null;
+        }
+    }
+
+}

src/main/resources/Kilt.mixins.json

@@ -121,7 +121,8 @@
     "compat.ratatouille.ShaderInstanceMixin",
     "compat.sodium.ItemRendererMixin",
     "compat.sodium.LevelRendererMixin",
-    "debug.PoseStackMixin"
+    "debug.PoseStackMixin",
+    "workarounds.early_screen_delay.MinecraftMixin"
   ],
   "injectors": {
     "defaultRequire": 1