[2.2.14 pre2] Strange OpenGL exclusive issue with Polyobjects, side textures seem to render on floor

As the title says, basically, the side textures of polyobjects render on the floor sometimes in 2.2.14 pre2. I think this started ever since a nightly build but I can't confirm which one. The gifs below show my level for the most recent OLDC as I'm writing this.

Gif in OpenGL:

Gif which starts in Software, then switches to OpenGL:

I am still unsure if this happens always, but this is definitely a regression, as 2.2.13 does not have this issue, at least to my knowledge. (btw this is my first time reporting an issue, so tell me if i could've done something better lol)