I have a slight issue. I've made some Custom Mounts, and they work perfectly except for one rather significant problem: if I'm riding in third person, they have a very high chance of causing the screen to become completely blue/grey. This colour covers the entire screen, but exists behind the HUD. It's only present in 3rd Person, and occurs on both Mounts. Additionally, one has a random chance to disappear when in 3rd Person, and this isn't occuring-- i.e., the Mount disappears completely, even though it is still there.
In both cases, the Mount rides fine, and is still usable in 1st person.
Any idea what is causing this?