This is a weird bug.
I sometimes see players on the lava map that are actually in the heaven map.
It only happens the other way around.
It looks like are flying but in reality they aren't.
Other players see it to.
For the note, they are moving and building in midair. The blocks appear in both maps.
This is well after the map changed. (after 3min orso).
We banned 11 players yesterday due this by accident in 10 minutes.