Logged-off on top of the apartment buildings (or inside it in any room) and when i logged back in i was under the building. i got out by running into the wall and jumping :)
this always happen when inside the building and sometimes when you are the top (roof)

Also almost on all buildings when i drop my gun on the top (roof) i can't find it anywhere it disappears and when i drop a gun in any room i find it in the room below that room ( this happens sometimes ).

and last thing is i never find anything in the apartments ... i mean i don't understand its always empty and i can't see anything , so i dunno are they empty or its only me that can't see anything inside them (even when server restart and i log in again and am sure nobody looted the apartments i can't find anything )

thank you :)