I left an instance while still in combat, then it didn’t remove me from instance as I died, and then tried to send me to nearest graveyard. Except that nearest graveyard was the Character Select screen.
I tried to go back on that character, for it to try and load me in the instance, then the loading screen changed to that of the generic Shadowlands one, and I got booted back to the character screen again. Rinse and repeat a few times, and it will either disconnect me or send me back to character screen. I tried reloading game and that did not help.