Spectators that are on fire play extinguishing noise while flying near water

If a player is on fire when put into spectator mode, they will rapidly play the fire extinguishing sound when they go through water, until they are put back into survival

The sound can only be heard by other players, the one in spectator can't hear anything.

 

Steps to reproduce
Set yourself on fire

Change to spectator (while still on fire)

Go fly around water near other players and watch their confusion.