I just completed a 3 hours play session. I encountered countless invulnerable monsters. If I fight them long enough, eventually they start being able to hit me and me hit them. I don't know if it's a terrain issue or what. Seems to be a lot worse in the swamps, when I draw them out of the swamp into the meadows or black forest, hits seems to resume faster but it might be my imagination. Very frustrating! Has there been a patch in the last day or so? I did not have that issues before.