Its always logged me into both until Friday night, when it suddenly stopped working. I tried changing all of my details and even the image as you’ve suggested, as well as the password and login email, but nothing yet.
I’m logged into the main page:
Clicked “Discussion” in the header to get to the forum. Not logged in the forum:
Clicked login on the forum in top right corner as usual and get bumped to edit page.
The site is working completely normally for me otherwise. Perhaps a link has broken somewhere in the back-end? (I really hope I’m not missing something obvious haha). The result is the same when I log-out from the main page and try to log in directly from the forum.