I have also seen this happen while making maps in the snapshots. Teleporting players large distances seems to trigger it for me. Multiple players will be teleported from one map to another and become invisible/intangible to others. The only solutions for me have been using /kill on the player (when they respawn they are fixed) or having them relog.
I have also seen this happen while making maps in the snapshots. Teleporting players large distances seems to trigger it for me. Multiple players will be teleported from one map to another and become invisible/intangible to others. The only solutions for me have been using /kill on the player (when they respawn they are fixed) or having them relog.