Game Crash when you run out of air underwater while wearing respiration enchanted helmet

What happens:

1. In a survival game, any difficulty setting, put on any helmet that has a respiration enchantment applied to it.
2. Go underwater and wait for your air bubbles to run out
3. Observe the game crash

Original Report:
When I'm underwater the game locks up on me, then crashes. When I relaunch the game all my progress since my last save/login is lost. The exception is my inventory. It's exactly the same as before the crash. My hunch is it's crashing when the game is trying to save to the disk.