ERROR - ceiling bounds disappears after stretching???

So im having an issue with the ceilingbound mesh. the transparent shiny wall things on the edge of the map. when you put them in a map in normal size they work just fine, in the editor and when you play through the editor. But if you stretch the meshes, they seem to disappear when in play mode? Any reason for this? I’ve gotten the Scorched Earth mesh to work after stretching it, but theres a threshold of how big you can stretch it before it disappears. Any way to get this to work? Currently I have the biggest size of the SE mesh i can make before it disappears, and copied it like 200 times to make my level walls. Pics for Context.

Mesh is visible here:

When in play mode its gone: