Yeah im not too sure what the problem is, i do know what the effect is. The AI movement is set to zero.Regarding freeze bug due to time format, I'm thinking something else is at play.
1) Start game, get bug at first boss
2) Get game applocale'd, still get bug
3) Get save, launch game without applocale, skip boss, play until third stage boss, bug again
4) Fire up applocale again, try both bosses with it, it works now
5) Try both bosses WITHOUT applocale, they work
That said, it's Unity game, can you even fuck it up so badly that it will rely on specific regional settings?
The reason this causes the freezing bug is cause in the first boss room you have a cutscene where the boss appears but since he doesn't move, he never reaches the checkpoint for the end of the cutscene, with means you are stuck there forever.