diff --git a/app/routes/chat/components/CampaignListBottomSheet.tsx b/app/routes/chat/components/CampaignProposalBottomSheet.tsx
similarity index 89%
rename from app/routes/chat/components/CampaignListBottomSheet.tsx
rename to app/routes/chat/components/CampaignProposalBottomSheet.tsx
index 48c8551..4da7ccf 100644
--- a/app/routes/chat/components/CampaignListBottomSheet.tsx
+++ b/app/routes/chat/components/CampaignProposalBottomSheet.tsx
@@ -11,9 +11,10 @@ interface Props {
     isOpen: boolean;
     onClose: () => void;
     onSelect: (detail: ProposalDetail) => void;
+    brandId?: number;
 }
 
-export default function CampaignListBottomSheet({ isOpen, onClose, onSelect }: Props) {
+export default function CampaignProposalBottomSheet({ isOpen, onClose, onSelect, brandId }: Props) {
     const [campaigns, setCampaigns] = useState<CampaignCollaboration[]>([]);
     const [loading, setLoading] = useState(false);
     const [loadingDetail, setLoadingDetail] = useState(false);
@@ -29,7 +30,10 @@ export default function CampaignListBottomSheet({ isOpen, onClose, onSelect }: P
                         status: "REVIEWING",
                         endDate: today,
                     });
-                    setCampaigns(data || []);
+                    const filtered = brandId
+                        ? (data || []).filter((c) => c.brandId === brandId)
+                        : (data || []);
+                    setCampaigns(filtered);
                 } catch (error) {
                     console.error("Failed to fetch campaigns:", error);
                 } finally {
@@ -38,7 +42,7 @@ export default function CampaignListBottomSheet({ isOpen, onClose, onSelect }: P
             };
             fetchCampaigns();
         }
-    }, [isOpen]);
+    }, [isOpen, brandId]);
 
     const options = campaigns
         .filter((c) => c.proposalId)
@@ -56,10 +60,8 @@ export default function CampaignListBottomSheet({ isOpen, onClose, onSelect }: P
 
         setLoadingDetail(true);
         try {
-            // Revert back to using proposal API
             const detail = await getProposalDetail(proposalId);
 
-            // Pass campaignId from collaboration list
             const result: ProposalDetail = {
                 ...detail,
                 campaignId: originalCampaign.campaignId
diff --git a/app/routes/chat/resuggest/resuggest-content.tsx b/app/routes/chat/resuggest/resuggest-content.tsx
index 7cd10ba..1cc8663 100644
--- a/app/routes/chat/resuggest/resuggest-content.tsx
+++ b/app/routes/chat/resuggest/resuggest-content.tsx
@@ -157,7 +157,7 @@ export default function ReSuggestContent() {
         setIsConfirmDialogOpen(true);
     };
 
-    const handleConfirmSubmit = () => {
+    const handleConfirmSubmit = async () => {
         const formData = formValues;
         const userId = tokenStorage.getUserId();
 
@@ -166,6 +166,11 @@ export default function ReSuggestContent() {
             return;
         }
 
+        if (!proposalData?.proposalId) {
+            toast.error("제안 정보가 없습니다. 다시 시도해주세요.");
+            return;
+        }
+
         const requestData = {
             brandId: proposalData?.brandId || 1,
             creatorId: Number(userId),
@@ -183,13 +188,14 @@ export default function ReSuggestContent() {
             endDate: formData.endDate || "",
         };
 
-        setIsConfirmDialogOpen(false);
-        setIsSuccessModalOpen(true);
-
-        reRequestCampaignProposal(proposalData!.proposalId!, requestData).catch((error: unknown) => {
+        try {
+            await reRequestCampaignProposal(proposalData.proposalId, requestData);
+            setIsConfirmDialogOpen(false);
+            setIsSuccessModalOpen(true);
+        } catch (error: unknown) {
             console.error("캠페인 재제안 실패:", error);
             toast.error("캠페인 재제안에 실패했습니다. 다시 시도해주세요.");
-        });
+        }
     };
     return (
         <div className="flex flex-col h-full bg-white">
diff --git a/app/routes/room/components/Bubbles/AttachmentMessage.tsx b/app/routes/room/components/Bubbles/AttachmentMessage.tsx
index 4a1ecad..bff7ac3 100644
--- a/app/routes/room/components/Bubbles/AttachmentMessage.tsx
+++ b/app/routes/room/components/Bubbles/AttachmentMessage.tsx
@@ -101,20 +101,16 @@ export default function AttachmentMessage({
         <div className="w-fit flex items-start gap-[10px] ">
           {/* avatar */}
           <div
-            className="shrink-0 rounded-[10px] bg-white overflow-hidden"
+            className="shrink-0 rounded-[10px] overflow-hidden"
             style={{ width: 38, height: 38 }}
           >
-            {avatarSrc ? (
+            {avatarSrc && (
               <img
                 src={avatarSrc}
                 alt="avatar"
                 className="w-full h-full object-cover"
                 draggable={false}
               />
-            ) : (
-              <div className="w-full h-full grid place-items-center text-[12px] text-[#5B5D6B]">
-                logo
-              </div>
             )}
           </div>
 
diff --git a/app/routes/room/components/Bubbles/ProposalMessage.tsx b/app/routes/room/components/Bubbles/ProposalMessage.tsx
index 1149cc6..61c40c9 100644
--- a/app/routes/room/components/Bubbles/ProposalMessage.tsx
+++ b/app/routes/room/components/Bubbles/ProposalMessage.tsx
@@ -282,20 +282,16 @@ export default function ProposalMessage(props: Props) {
         <div className="w-fit flex items-start gap-[10px] max-w-full">
           {/* avatar */}
           <div
-            className="shrink-0 rounded-[10px] bg-white overflow-hidden"
+            className="shrink-0 rounded-[10px] overflow-hidden"
             style={{ width: 38, height: 38 }}
           >
-            {avatarSrc ? (
+            {avatarSrc && (
               <img
                 src={avatarSrc}
                 alt="avatar"
                 className="w-full h-full object-cover"
                 draggable={false}
               />
-            ) : (
-              <div className="w-full h-full grid place-items-center text-[12px] text-[#5B5D6B]">
-                logo
-              </div>
             )}
           </div>
 
diff --git a/app/routes/room/components/Bubbles/TextMessage.tsx b/app/routes/room/components/Bubbles/TextMessage.tsx
index 428f256..dee244e 100644
--- a/app/routes/room/components/Bubbles/TextMessage.tsx
+++ b/app/routes/room/components/Bubbles/TextMessage.tsx
@@ -55,20 +55,16 @@ export default function TextMessage ({
         <div className="flex items-start gap-[10px] max-w-[80%]">
           {/* avatar */}
           <div
-            className="shrink-0 rounded-[10px] bg-white overflow-hidden"
+            className="shrink-0 rounded-[10px] overflow-hidden"
             style={{ width: 38, height: 38 }}
           >
-            {avatarSrc ? (
+            {avatarSrc && (
               <img
                 src={avatarSrc}
                 alt="avatar"
                 className="w-full h-full object-cover"
                 draggable={false}
               />
-            ) : (
-              <div className="w-full h-full grid place-items-center text-[12px] text-[#5B5D6B]">
-                logo
-              </div>
             )}
           </div>
 
diff --git a/app/routes/room/page.tsx b/app/routes/room/page.tsx
index 6bde332..39c7cab 100644
--- a/app/routes/room/page.tsx
+++ b/app/routes/room/page.tsx
@@ -17,7 +17,7 @@ import useChatLayout from "./hooks/useChatLayout";
 import useChatStomp from "./hooks/useChatStomp";
 import useChatActions from "./hooks/useChatActions";
 import { useCampaignProposalStore } from "../../stores/campaign-proposal";
-import CampaignListBottomSheet from "../chat/components/CampaignListBottomSheet";
+import CampaignProposalBottomSheet from "../chat/components/CampaignProposalBottomSheet";
 import { getMyCollaborations } from "../business/calendar/api/calendar";
 
 type Props = {
@@ -178,6 +178,8 @@ export default function ChattingRoom({ roomId }: Props) {
       >
         <div className="w-full">
           <div className="w-full space-y-2">
+
+            {/* 채팅마다 나오는 말풍선 (Bubble) */}
             {messages.map((m, idx) => {
               const isMe = m.senderType === "USER" && m.senderId === myUserId;
               const { dateText, timeText } = formatKoreanDateTime(m.createdAt);
@@ -229,14 +231,16 @@ export default function ChattingRoom({ roomId }: Props) {
         height={sheetHeight}
       />
 
-      <CampaignListBottomSheet
+      {/* 캠페인 재 제안하기 버튼 */}
+      <CampaignProposalBottomSheet
         isOpen={isCampaignSheetOpen}
         onClose={() => setIsCampaignSheetOpen(false)}
+        brandId={detail?.brandId}
         onSelect={(campaign) => {
           setProposalData({
             proposalId: campaign.proposalId,
             campaignId: campaign.campaignId,
-            brandId: campaign.brandId,
+            brandId: detail?.brandId || campaign.brandId,
             campaignTitle: campaign.title,
             campaignDescription: campaign.description,
             rewardAmount: campaign.rewardAmount,