Nope, I haven't had any problems like that, but then again I'm not using map entities most of the time. If you like, you can PM me a download link to your project and I could take a look at it, I still think it's a camera.clip_near , camera.clip_far issue, eventhough it could be something else.

By the way, not that it really should matter, but preview mode uses the standard amount of nexus, which is not 500, unless I've missed a new feature.

Cheers