Ambience - Like Medical music gets stuck

### Testmerges

N/A

### Round ID

N/A

### Description of the bug

Be a ghost in an area like medical.
Be put into a larva or something.
Medical music follows you to haunt you.

An issue with all ambiences but most noticeable with medical

### What's the difference with what should have happened?

It goes away

### How do we reproduce this bug?

1.Be a ghost in an area like medical.
2.Be put into a larva or something.
3.Medical music follows you to haunt you.
...

### Issue Bingo

- [x] Issue could be reproduced at least once
- [x] Issue happened in a recent (less than 7 days ago) round
- [x] Couldn't find an existing issue about this (https://github.com/cmss13-devs/cmss13/issues)

Start by reproducing the issue in a medical area as a ghost, then enter a larva or similar entity and trace the ambience and music state involved. Done means the medical ambience, and other affected ambiences, stops following the ghost after the transformation.

Written by the indexing model from the issue text.