In chapter 6, in the room with the purple key, one of Fradz boxes dissapears and never comes back.
Either when I leave that room, or move, or when I pick up the purple key, can't really remember of discern when exactly.
1st box of Fradz (middle-right).
It's definitely something related to the Unholy Cloak. When I put it in the box, the box slowly starts to fade away, almost like an invisibility thing, and then dissapears. And no matter what I do, I can't bring it back.
This never happened in previous versions.