Diamora just leaving part way through boss fight (1,599,543,112)

Walked into boss fight. Attacked her like twice until she did her "Jump into water" phase. Once she jumped in, she never came back out!

I'm in demon form for infernilist. Idk if that changes anything. I have noticed this form has caused a few other bugs.

Such as arriving to a new island whilst already in demon form disallows map traversal (I can go like 10 steps and it tps me back to row boat). Which is fixed by exiting to character screen and rejoning.

This bug is a bit more annoying as it seems I will have to refresh whole area and restart.