On browser, yeah. In fact I've reloaded the page and game to see if it solved it but it didn't. Eventually it seems like all the adventurers are now just hovering around the tables, never moving.
That one adventurer's face and health are still on that floor, too.
Anything you want me to try? I could try deleting the rooms on that floor or something? Seeing as I'll have to restart the game anyway at this point, I'm happy to give anything a go.