A/B Testing mode stuck indefinitely on "Generating..." status #3924

In the Side-by-Side (A/B testing) mode, the response generation gets stuck indefinitely showing "Generating...". This issue has been persisting for over 4 weeks continuously.

​Steps Taken / Troubleshooting Attempted
I have already tried all standard client-side troubleshooting methods, but the issue remains unresolved:
​Cleared browser cache, cookies, and site data.
​Tested in Incognito / Private mode.
​Tried multiple browsers (Chrome, Edge, Firefox).
​Started new chat sessions / rounds.
​Performed hard refreshes (Ctrl + F5).
​Checked network settings and toggled VPN connections.

​Expected Behavior
The models should complete their generation and display the outputs in the A/B comparison window within a reasonable timeframe, or time out properly.