Problems in raid's

[Coolfox]

Hey guys, I'm fairly new concerns mangos server. Now I encountered a problem while doing a raid.

In every raid by the way. When they attack, the attackers will fall down, as it were through the ground, and then disappear from the screen.

They come back when i take my distance. It's like they are in a loop or something.

Has this to do because entering as a GM? I set this mode off. Otherwise, how can I debug this. Or is this something you can't do ingame.

THX