Mystery (Overhead?) Terrain Obscurring Sekhemas Gauntlet Room

As I was progressing through one Gauntlet Room, a giant portion of my screen was obscured by what looks like the floor of another room loaded on top of the one I was currently on. I'm not exactly sure what to call it, but the main reason I bring this up is because this terrain aberration heavily blocks the view of the flame traps. I had to sort of guess as I rolled through most of the streams.I came back to the area to take screens after I completed the room. This would be a very disatisfying way to fail the trial!



Full disclosure my PC rig is kinda old, so perhaps this is an artifact of that.

Got it again, here's a picture of what its like when the traps are active: