Suffocating in boss arena - relogging during a fight

1. Stand directly on top of the altar (end portal frame) 2. Start a boss fight 3. After the fight starts, log out, log back in about 1 min later This causes the boss arena to reset, and you log back into the altar. I think this actually occurred to me on accident (started a boss but suddenly had to go) earlier, though I don't know if this is likely to occur on accident. Again, reporting so you're aware