When a player dies in water because the player drowned in water, the water breathe bottle fills up after the player respawns. However, you need to be on a server with another player for this to happen.
Air bar does not reset upon death
Breath Meter Needs To Recharge After Death
Status effect particles and flames remain after death in server environment
Air meter doesn't instantly reset upon respawning
Frozen State doesn't go away after respawn when on a server