The Legend of Heroes: Trails in the Sky

[Megidolaon]

I found that both story bosses with this problem, the cat monsters on the farm and the dog monsters later on do not actually crash.
The game just gets super slow and after like 7-10 minutes it actually continues and the battle starts, afterwards I can continue normally.

But the optional enemies (the ones that look like stones with wings and halos) do crash the game.
Without fast memory it can take upward of 40 minutes but they will inevitably crash the game and will never start the fight.

I am quite worried that soon there will be a boss fight that will also inevitably crash.