Fixed Linedef Action Change Music not working as intended

When a level has "Change music" attached. if someone rejoins the server (without restarting their game), change music will affect others.

Heres a video explaining the situation using Park Valley as the example.

Edit: this issue can still occur even if someone joins midgame, or even if they restarted their game to rejoin.
https://www.youtube.com/watch?v=i7VT9gGqOZI

edit:This has been fixed in 2.2.1