Free Version Playing only AC/DC while not on the any Playlist

[TigerRobocop]

Plan

Free/Premium

Country

Brazil

Device

Samsung A10

My Question or Issue

Hi guys, I'm a free user and searching the forums I saw a lot of questions of people having song not on their playlist being played. Songs that were similar the ones on the playlist. It kinda happened to me, but its a little different.
I have a list with Melodic Metal (like Rhapsody and Dragonforce), a Classic Rock List and started listening the "This is Gamma Ray" premade list. And in ALL 3 cases, after playing only one or two songs from the list the app starts playing AC/DC.
ONE AC/DC SONG AFTER THE OTHER, ALBUM AFTER ALBUM.
I disabled Auto-Play, deleted and recreated the lists and also reinstalled the app.
Really thinking about switching to deezer or something like that.
Thanks on advance!