[Bug]: Infinite websocket reconnect loop when user has no teams (fresh setup)

Before you file a bug report

• I have checked the issue tracker and have not found an issue that matches the one I'm filing.
• This issue is not a troubleshooting question. Troubleshooting questions go here: https://forum.mattermost.com/c/trouble-shoot/16.
• This issue is not a feature request. You can request features and make product suggestions here: https://mattermost.uservoice.com/forums/306457-general/.
• This issue reproduces on one of the currently supported server versions.
• I have read the contribution guidelines and the Mattermost Handbook Contribution Guidelines.

Mattermost Server Version

v11.6.0

Operating System

centos 9 stream on server + Windows 11 on client

Steps to reproduce

Fresh install Mattermost (v11.6.0) Create/login user Ensure user is not part of any team Open web UI

Expected behavior

Stable onboarding or team selection screen No WebSocket reconnect loop UI should remain functional when user has no teams

Observed behavior

Client redirects due to teams.length === 0 Main component unmounts WebSocket is closed (websocket closed manually) Client reconnects Loop repeats indefinitely

Log Output

Additional Information

Frontend routing triggers before app reaches stable state.

In logged_in.tsx:

if (teams.length === 0) { historyPush('/select_team'); return; }

This causes:

React unmount WebSocketClient.close() call reconnect cycle

Relevant file:

webapp/channels/src/components/logged_in/logged_in.tsx

WebSocket cleanup:

webapp/channels/src/utils/websocket.ts

Workaround

Create a team and add user:

mmctl team create main --display-name "Main" mmctl team users add main