diff --git a/web/sidebar/community-picker.react.js b/web/sidebar/community-picker.react.js
--- a/web/sidebar/community-picker.react.js
+++ b/web/sidebar/community-picker.react.js
@@ -11,6 +11,7 @@
 import {
   clearCalendarCommunityFilter,
   updateNavInfoActionType,
+  clearChatCommunityFilter,
 } from '../redux/action-types.js';
 import { useSelector } from '../redux/redux-utils.js';
 
@@ -41,6 +42,9 @@
           type: updateNavInfoActionType,
           payload: { tab: 'chat' },
         });
+        dispatch({
+          type: clearChatCommunityFilter,
+        });
       }
     },
     [dispatch, isCalendarOpen],