oooooh I thought Spotify just had a schizophrenic A/B test started every other quarter, I didn't realize the UI changes are contingent on what kind of song list you were listening to.
Just recently they started playing the exact same ads but sometimes they have a few syllables messed up. I think I now have first-hand experience in being gaslit, it really makes you doubt your sanity if you heard the "same" ad but "wrong".