One-Way Invisible Wall/Floor Bug in Desolate Pass

In the first, second, and third photos, you can see what this cave looks like from the outside; the texture appears completely broken and transparent. In the video, I show how I enter, but then I’m unable to get back out. At the spot where I entered, it was clear that I had passed right through a transparent wall/floor —yet, from the inside, that texture looks completely okay, it’s just a ceiling or a wall in a cave. In other words, the opening I used to get in simply does not exist when viewed from the inside.

Broken transparent texture

Should’ve been fixed