Volume increase on song change

So I’m not sure if this is a bug for plasma, fedora, Spotify, or the headset I’m using.

So I have Spotify playing most day during work, and when a song ends and a new begin it increases the volume by one step (5%). However, it doesn’t always do this and it is seems to be random.

I would like some help to troubleshoot what is going on, so that I can provide a bug report to the correct party.

Definitely seems like an issue with Spotify, especially if it doesn’t happen in other apps. I don’t see this while playing music in Elisa, FWIW.