Hi there

This is not a major issue but it get pretty annoying over time.

Basically, if I encounter a evoker in the dungeon, its theme will play, and if I kill it too quickly, the theme will playing none-stop even after killing it, resulting in the whole dungeon playing the same music.

How to reproduce: 

I have tested in the map Pumpkin Pastures and HighBlock hall, and both maps have this issue (so maybe it has something to do with evoker's code overall), sometimes it's fine, but most of the time it triggers this bug. Happened in both apocalypse and adventure difficulty, haven't tested default difficulty.

Thanks!