Exactly same problem, issue persists for half a month now.
My GX mod is still up, and it shows that I'm still logged in until I try to visit the Dashboard or gx.games or anything GX really
Tried on:
LMDE with Firefox and Chrome
Windows 10 with Firefox, Chrome and OGX
Android 12 with Chrome Mobile and OGX mobile
Each browser up-to-date, same with drivers and OS.
Screenshot:
90c97a92-f107-4712-ad4d-abf853848c97-image.png