Oh i found a bug in the game.
During the last phase of the succubus fight, i have no idea how this happened but Simon can't attack her and she doesn't attack him. I can move Simon around the stage but nothing's happening, thus, much to my dismay, i had to restart the fight.
Maybe not. Did you press R? When the orb she's in is worn down, it become silver, which unfortunately looks a lot like the other orbs. They show you that you press R to grab it earlier in the fight, but after that I was confused for a few minutes, expecting that prompt again. That could be it.
On the topic of bugs in general though, I've encountered a few, but they didn't affect gameplay at all. One of them had Simon snap a merman's neck, but wasn't actually holding the merman. He has the force! Another was a camera bug where it slipped up and I saw the boxes around the doors that you step in to go to the next area.