I was fighting Audrey on lvl 2, used the poison spell book and the wand on her.
After I killed her, she just vanished. No animation, no drops, no portal, nothing.
When I try to save and exit, it tells me that I am still in combat.

I saw another thread, where a person said that the last boss just died and, like in my case, nothing happened afterwards.

It is a pretty shirty glitch. Anyone have an idea what causes it and how to avoid it?
Besides that, are devs still offering support for this title?