PC Character Locked After Linking PSN Account

I have a lvl 82 character that I played exclusively on PC. Just now I've linked my PSN account, booted up the game on PS5, created another character and played it for half an hour.

After that I went back to PC to play my main character, and now I can't log in with that character, getting 'An unexpected disconnection occurred'. I can still log in with my new character, created on PS5, but not with the main one.

Is this a known issue? Is there anything I can do to unlock the character?

Edit: Unable to log in with the main character on both PS5 and PC, while the new character is playable on both platforms. The main character was in my dreadnought hideout when I last played it.

Kinda fixed it by creating a new character on PC, where most of my microtransactions are, and equipping all of the cosmetics I had on the main character to this new character, effectively unequipping them from the main. Now I can finally log in with it!