diff --git a/js/ui/videoModalCommentController.js b/js/ui/videoModalCommentController.js
index 3faf6eb1..fb999dbb 100644
--- a/js/ui/videoModalCommentController.js
+++ b/js/ui/videoModalCommentController.js
@@ -356,7 +356,9 @@ export default class VideoModalCommentController {
       return;
     }
 
-    this.modalCommentProfiles = this.createMapFromInput(snapshot.profiles);
+    this.modalCommentProfiles = this.createMapFromInput(snapshot.profiles, {
+      normalizeKey: this.utils.normalizeHexPubkey,
+    });
     this.modalCommentState.parentCommentId = normalizeString(
       snapshot.parentCommentId,
     ) || null;
@@ -407,7 +409,9 @@ export default class VideoModalCommentController {
     }
 
     const comments = this.createMapFromInput(payload.commentsById);
-    const profiles = this.createMapFromInput(payload.profiles);
+    const profiles = this.createMapFromInput(payload.profiles, {
+      normalizeKey: this.utils.normalizeHexPubkey,
+    });
     profiles.forEach((profile, pubkey) => {
       this.modalCommentProfiles.set(pubkey, profile);
     });
@@ -469,22 +473,41 @@ export default class VideoModalCommentController {
     }
   }
 
-  createMapFromInput(input) {
-    if (input instanceof Map) {
-      return new Map(input);
-    }
+  createMapFromInput(input, { normalizeKey = null } = {}) {
     const map = new Map();
+    const applyKey = (key) => {
+      if (!normalizeKey) {
+        return key;
+      }
+      const normalized = normalizeKey(key);
+      return normalized === null || normalized === undefined ? null : normalized;
+    };
+
+    const setEntry = (key, value) => {
+      const normalizedKey = applyKey(key);
+      if (normalizedKey === null || normalizedKey === undefined) {
+        return;
+      }
+      map.set(normalizedKey, value);
+    };
+
+    if (input instanceof Map) {
+      input.forEach((value, key) => {
+        setEntry(key, value);
+      });
+      return map;
+    }
     if (Array.isArray(input)) {
       input.forEach((entry) => {
         if (Array.isArray(entry) && entry.length >= 2) {
-          map.set(entry[0], entry[1]);
+          setEntry(entry[0], entry[1]);
         }
       });
       return map;
     }
     if (input && typeof input === "object") {
       Object.entries(input).forEach(([key, value]) => {
-        map.set(key, value);
+        setEntry(key, value);
       });
     }
     return map;
diff --git a/tests/video-modal-comments.test.mjs b/tests/video-modal-comments.test.mjs
index 02f1f4aa..883a8058 100644
--- a/tests/video-modal-comments.test.mjs
+++ b/tests/video-modal-comments.test.mjs
@@ -120,6 +120,63 @@ test("VideoModal comment section toggles visibility and renders hydrated comment
   assert.equal(modal.commentsList.getAttribute("data-empty"), null);
 });
 
+test(
+  "VideoModalCommentController attaches profiles using normalized pubkeys",
+  async () => {
+    const appended = [];
+
+    const controller = new VideoModalCommentController({
+      commentThreadService: {
+        setCallbacks: () => {},
+        teardown: () => {},
+        loadThread: () => Promise.resolve(),
+      },
+      videoModal: {
+        setCommentSectionCallbacks: () => {},
+        hideCommentsDisabledMessage: () => {},
+        showCommentsDisabledMessage: () => {},
+        setCommentsVisibility: () => {},
+        clearComments: () => {},
+        resetCommentComposer: () => {},
+        setCommentStatus: () => {},
+        setCommentComposerState: () => {},
+        appendComment: (comment) => appended.push(comment),
+      },
+      auth: {
+        isLoggedIn: () => true,
+      },
+      utils: {
+        normalizeHexPubkey: (value) =>
+          typeof value === "string" ? value.toLowerCase() : null,
+      },
+    });
+
+    controller.load({ id: "VideoCase", enableComments: true });
+    await Promise.resolve();
+
+    controller.handleCommentThreadAppend({
+      videoEventId: "VideoCase",
+      commentsById: new Map([
+        [
+          "c1",
+          {
+            id: "c1",
+            pubkey: "AbCd",
+            kind: COMMENT_EVENT_KIND,
+            content: "Hi",
+            tags: [],
+          },
+        ],
+      ]),
+      commentIds: ["c1"],
+      profiles: new Map([["ABCD", { name: "Mixed Case" }]]),
+    });
+
+    assert.equal(appended.length, 1);
+    assert.deepEqual(appended[0].profile, { name: "Mixed Case" });
+  },
+);
+
 test("VideoModal comment composer updates messaging and dispatches events", async (t) => {
   const { window, document, modal, cleanup } = await setupModal();
   t.after(cleanup);