HA Web wont stay logged in - Fresh Win 11 PC

Configuration
1

I have an existing HA install that works well. Multiple clients (Web and Apps) all log in without issue - and stay logged in. I recently rebuilt my main PC to Windows 11 (Fresh Install) and now HA wont stay logged in - regardless of the “Remember me” box being ticked. happens on Both Chrome and Edge. Happens with local URL or my duckdns.org external URL. I can see a new “refresh token” being generated each time I log in - but the moment I close the window, I have to log back in.

Any ideas ?

2

Check that your clock, date and timezone is correct on your Windows machine.
Check that you can and do store the cookie from your HA URL in your browsers.

3

Which browser you use? Sounds like cookies clear on browser exit to me. HA on https or not?