Redirecting to wrong URL (error 500, 404, etc) after waking up a sleeping tab on new browser

Description of the problem

The error happens on some application after the browser put a tab in sleep and we are triing to reconnect. This happen on new browser like edge, chrome and firefox, but most likely on all browser. Must of the time it's a random URL and sometime (signalr and django API) the URL point to something like that:
https://xxxx.thinkhead.org/signalr..234230985488993/api/request

Steps to reproduce it

1. Open a browser
2. Visit https://read.thinkhead.org/
3. Wait for the tab to go to sleep
4. Re-loging

Expected behavior

Supposed to correctly login and redirect to same page left or the domain root if the application token expired.

Behavior detected

Error 500 or 404

Environment

• OS: All
• Browser: All

Additional context

Imported from ThinkBugs (Astuto), originally posted 2024-08-23.