User unable to join a specific team although being a member

Summary

user (“krisztinaandre”) unable to join a specific team (“München DSC”) although being a member of that team

Steps to reproduce

Team Edition
Mattermost Version: 5.2.1
Database Schema Version: 5.2.0
Database: postgres

Expected behavior

The team “München DSC” is existing and the user “krisztinaandre” is a member of that team. The user is member of a large number of other teams as well. In case the user opens the “Join another team” option, the team “München DSC” is one of the listed teams.

Observed behavior

If krisztinaandre opens the “Join another team” option, the team “München DSC” is not showing up.
Then we tried what would happen, if krisztinaandre would directly navigate to the URL https://mattermost.diem25-connect.eu/munchen-dsc/channels/webseite?fbclid=IwAR2CHwstHzUai8U1RAffwYo6DB6fNyhHFtWJVQYVQSwOchokpK0OknVzMuo: The website appeared for a sub second moment followed by an error message saying the site either does not exist or is a private site.

Hi @mkleberg,

Would you be open to upgrading to the latest version (v5.10) and see if the issue still persists? There may have been a bug in an older version that has since been fixed.