Unreal's really a bitch about geometry. It wasn't there for me (you can see it in my earlier screenshot), maybe it happened during the last rendering process after I added geometry somewhere completely different, I'll take a look.
But glad that's the only issue you've found =D
Edit: Fixed! You're right, there was a hole, and it wasn't there before, it's one of these Unreal Engine things that just happens sometimes. Maybe it's because a wall somewhere entirely different was built.
Anyway, the updated version is now in the Downloads section.
Last edited by Spec; 16-02-18 at 07:24 PM.