I’ve noticed that some random songs that I barely listen to have the green download arrow next to them when I search and view them from the album. I thought I might have them in an old playlist but then it happened with a newly released album it thought something was wrong, as shown in the pictures.
The album released at midnight (Artist: Fredo) and I looked at it at 2:47am, where I found that it was already downloaded even though the songs are not in any playlist or liked and have only just being released. I’ve also not found anyway to un-download them because I don’t know where they are downloaded in the first place. This doesn't happen for every album (Artist: 21 Savage) as shown in the pictures.