Fix for this was put in place a little while ago; forgot to report it.
In cases where a map may feature a mission with sound files (think Memes VS Machines) the sound file will get added to the downloads list for that particular map.
Look. We worked harder on this than was needed, let us have this one. You can read about this here : https://www.scg.wtf/jb/d/7015-fixedtf2-we-fixed-a-bug-with-snipers-and-teleporters