When you relog into the world where you log out last time in The End dimension, the cave sounds immediately plays as soon as you rejoin the world.
Step to Reproduce
1. Get to The End.
2. Kill the dragon.
3. Quit the world and relog back in
Expected Result
No cave sounds playing when you relog.
Heard Result
Cave sounds immediately play to scare you in The End.
I want to clarify: the sound of caves is such a slightly creaky scary sound. Right?
I do not understand exactly if these are the sounds of the caves, but some kind of sound is reproduced when entering the world in the end. It really does sound like the sound of caves. Confirmed.