The issue persisted for the better part of a year. I hope someone fixes it. Attached is a link to a recording (because apparently mp4 is simultaneously allowed and not allowed for uploading). https://gfycat.com/thoseinfamousazurewingedmagpie
In there I play a song, RAM usage goes up, I kill the tab, RAM usage goes down. Forum autosave function is less than adequate so you get to see a previous draft.