Suffocating in boss arena - transition between Deep Creature to inactive

1. Wait for a deep creature fight to start. 2. Wait for the "fight was cancelled" message (no players joined) 3. Stand at coordinates x -203 y 76 z -30 4. When the arena transitions back to the "no boss" default arena, you will suffocate. You can save yourself by doing /spawn, but if this happened to a new player, they may panic or simply not think to try and die. No idea how likely this is to occur on accident (it's certainly not specific to those exact coordinates), but reporting so it's known