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
@@ -4,7 +4,10 @@
 import * as React from 'react';
 import { useDispatch } from 'react-redux';
 
-import { clearCalendarCommunityFilter } from 'lib/actions/community-actions.js';
+import {
+  clearCalendarCommunityFilter,
+  clearChatCommunityFilter,
+} from 'lib/actions/community-actions.js';
 import { useModalContext } from 'lib/components/modal-provider.react.js';
 import SWMansionIcon from 'lib/components/SWMansionIcon.react.js';
 
@@ -42,6 +45,9 @@
           type: updateNavInfoActionType,
           payload: { tab: 'chat' },
         });
+        dispatch({
+          type: clearChatCommunityFilter,
+        });
       }
     },
     [dispatch, isCalendarOpen],