Sorry i took a long long time getting around to addressing this (depression), but I'm going to look into some of these issues. Thanks for bringing them up for me.
The basty is meant to be a rare random encounter, but from multiple reports, it seems to appear more often than the probability I set should suggest. Instead, I'm going to make sure the player doesn't encounter it until they are equipped to handle it.
I'll also work on a way to freeze enemy movement while dialog boxes are open.