diff --git a/lib/reducers/user-reducer.js b/lib/reducers/user-reducer.js
--- a/lib/reducers/user-reducer.js
+++ b/lib/reducers/user-reducer.js
@@ -231,8 +231,7 @@
     ];
   } else if (
     action.type === joinThreadActionTypes.success ||
-    action.type === newThreadActionTypes.success ||
-    action.type === findUserIdentitiesActionTypes.success
+    action.type === newThreadActionTypes.success
   ) {
     const newUserInfos: UserInfos = _keyBy(userInfo => userInfo.id)(
       action.payload.userInfos,
@@ -245,6 +244,35 @@
       userStoreOps,
     );
 
+    if (!_isEqual(state.userInfos)(processedUserInfos)) {
+      return [
+        {
+          ...state,
+          userInfos: processedUserInfos,
+        },
+        [],
+        userStoreOps,
+      ];
+    }
+  } else if (action.type === findUserIdentitiesActionTypes.success) {
+    const newUserInfos = action.payload.userInfos.reduce(
+      (acc, userInfo) => ({
+        ...acc,
+        [userInfo.id]: {
+          ...state.userInfos[userInfo.id],
+          username: userInfo.username,
+        },
+      }),
+      {},
+    );
+
+    const userStoreOps: $ReadOnlyArray<UserStoreOperation> =
+      convertUserInfosToReplaceUserOps(newUserInfos);
+    const processedUserInfos: UserInfos = processUserStoreOps(
+      state.userInfos,
+      userStoreOps,
+    );
+
     if (!_isEqual(state.userInfos)(processedUserInfos)) {
       return [
         {