[Nytingale]

So here's an update concerning the 4th bug:

It seems to occur for me whenever I proc Voltiger and Perfect Poise from a Crit Riposte; although, it doesn't appear to happen all the time. Furthermore, I've noticed that after the screen "returns to normal", my position has been teleported to some other rather spot on the map - no, not the "move 1 tile back" from Voltiger; I mean a huge "leap" in distance from your original position to some other spot.

Edit: I think the mob must also die from the Crit Riposte to trigger the black screen, as I just performed everything there except killing the mob and the bug did not die.