diff --git a/ts/models/conversations.ts b/ts/models/conversations.ts
index 4fe31e135..e5121ae34 100644
--- a/ts/models/conversations.ts
+++ b/ts/models/conversations.ts
@@ -3641,6 +3641,7 @@ export class ConversationModel extends window.Backbone.Model<
         `Setting sealedSender to UNKNOWN for conversation ${this.idForLogging()}`
       );
       this.set({
+        profileAvatar: undefined,
         profileKey,
         profileKeyVersion: undefined,
         profileKeyCredential: null,