Only happy to point it out.!
Have been working with the same problem right now and there is this gate that works as a passage to a different level. But i want to make a menu from the same scenery in that level but it just dissapears... i am going to re-create the scene without any global setting or script for that might be the case. will let you know if i find something.
p.s i worked for me before and the gate did showed up on my menu.
cheers