Today, I encountered a case where I couldn’t close a mask layer floating window. I could close the others but not that one. Also, I encountered a situation where PF was stuck at caching, eventually crashing. Let me qualify the word stuck by saying that the GUI was still operational. Unfortunately, I cannot reproduce either issues.
Both cases happened as I was editing my latest PlayRaw. Second case was when I started moving the module layers around and toggling them.