It likely started with a band performing a new song that hasn't been released yet Someone recorded it and downloaded to their IG page. Youtubers got wind of it and started posting it without verifying its source. Because the song hasn't been released yet also means there is no digital ID for it and YouTube has no way to track it. Due to pressure from the licensing company, YouTube (having 5 billion views a day) had to do a manual search, issue copywrite strikes, to forcefully remove all bootlegged material from its platform. I can only speculate on YouTubes current and future behavior. I'm still inclined to believe this is temporary, but I have misgivings if YouTube cares what I think.
Edit: Your connected to this too Mr. Innocent. Because a band you like is a party of that unreleased song.