Laptop, PC, Android phone (HTC One M9 PCE)
Windows 7, Windows 8.1, Android
My Question or Issue
For the last couple weeks I have been having this problem: some random playlists including dance music (that I don't ever listen to) are being "played" by some phantom devices that I am sure do not belong to me (and most likely don't even exist). They either interrupt the playback of what I'm playing, or - when I pause "my" music - start playing on their own, on those "phantom" devices (always named "web player (chrome)", usually there's more than one instance of these). I am pretty sure that these devices don't physically exist and that no one has got access to my account (logged in via Facebook, recently (after this has started happening) changed password, used the "sign out everywhere" feature of Spotify) - I believe this to be a software bug, but I can't quite tell for sure.
This happens on all devices I use - my PC, the laptops I use, as well as on my phone.
Please help me, this is really annoying.