Continuous arrow drop/sound in water.

I was just casually playing Minecraft and encountered this, and didn't see it anywhere else.

Skeleton went underwater, was shooting, and the arrow sounds wouldn't stop. I tried to reload chunks, reloaded world, broke blocks under, nothing stopped the sound until they despawned.

 

https://www.youtube.com/watch?v=c7XZHE50c84

https://www.youtube.com/watch?v=9MtMC4dgM1U