I can confirm that I also have that bug crush in exactly the same moment. I'm trying change circumstances like force engine to reread the location, making another save, collecting some item etc. but no matter what, game crashing.
So I took the save, moved it to PSP port and finished the game on Adrenaline... First, my plan was to omit this faulty point in the game and return to PSV native but no luck. Vita port don't see PSP port save for some mysterious reason...
Also I have problems with music. It's scratching all over time.
HENkaku is a native Homebrew Enabler for the PS Vita and PS TV. It lets you run homebrews on the PS Vita