diff --git a/lib/shared/thread-utils.js b/lib/shared/thread-utils.js
--- a/lib/shared/thread-utils.js
+++ b/lib/shared/thread-utils.js
@@ -1319,7 +1319,10 @@
           userInfoInputArray.length,
           params.allUsersSupportThickThreads ? 'thick' : 'thin',
         ),
-        members: [loggedInUserInfo, ...userInfoInputArray],
+        members: [
+          { ...loggedInUserInfo, isViewer: true },
+          ...userInfoInputArray,
+        ],
       });
     },
     [baseThreadInfo, threadInfos, loggedInUserInfo, pendingToRealizedThreadIDs],