What is wrong?

When spawning in a world that has a sound playing at the current position, it will play untill it ends and cannot be stopped / turned off via /stopsound.

How should it be working?

A sound normaly stops when running the "/stopsound @a" command, or should pause when opening the ESC menu / title menue but it doesn't. interesting enough, when entering another world, the sounds stop but play again as soon as you leave the world and enter the world with the existing sound again.

How to reproduce it?

be sure to have sound on. go into a singleplayer world and start a sound that is long enough. (Music or Jukebox) and play it to the master sound layer. (example: /playsound minecraft:music.menu master @a ~ ~ ~ 10) (or just play a music record) when pressing esc while the music is playing, you notice it being stopped. however upon reentering the world, this wont work anymore. the sound will play till the end without ending. /stopsound @a doesn't work either. it even plays after closing to the minecraft start screen.