Why is BSP Geometry Clipping Out

Using Unreal Tournament Editor, I’m having this issue where BSP geometry placed in certain sections of my level are becoming transparent, as if they were arbitrarily sliced. However, when moving the geometry to a different section of the level, the geometry completely returns to its native form. There aren’t any subtractive brushes conflicting in this location.

Recreating a new brush in the same location continues to cause the issue. I would imagine this is a common issue as it has occured often while editing although I’m yet to find out what causes it or how to prevent/fix it.

While in the area:

After moving it:

Hello.

As far as I know this seems to be happening when it is colliding with anything, though I am not a 100% sure of it. What you can do is separate them, make meshes and then put them in place.