I think I might have encountered a weird bug where the DK bosses never refresh until I "reroll world". I can kill bosses 1-2-3-4 but when I get back to 1 it is still dead and the portal out is still there. The normal behaviour is #1 respawn once 3 more bosses have been defeated.

I remember having this bug previously but I don't remember how I made it stop. It seems like it affects all my characters so I reinstalled all my files but nothing changed. I am posting here in case it is a known bug and there is a known fix that someone could offer. I am done farming DK on this character but this could be of use to me once I start another.