For whatever reason, connect doesn't only work on wifi. It works on ALL devices connected to your account.
In my testing, using spotify desktop, rabbit (pulled up spotify web), an LG G5, and a friend's iphone.
From Desktop, I could control Web (neither connected to same network), and from the friend's iphone, she could control what was on my computer from a different state (I did give her my credentials). Note that the devices listed all can control this, but this was some examples of what I have experienced.
Ok so i have an issue whenever i listen to my spotify on anywhere other than my phone and it connects so some random a$$ ps4 near me and he is DELETING ALL OF MY FAVOURITE SONGS AND ADDING HIS THROWBACK 60’s MUSIC SOMEBODY HELP PLEASE THAT WONT RESULT IN ME GETTING A NEW ACCT THEREFORE LOSING ALL MY MUSIC
So, it is now 2018, and I am still unable to turn off this unwanted feature. I would be fine if it only connected when I asked it. But the fact that devices can fight over what song is playing is complete BS. I have been using spotify for many, many years. And this "feature" is making me want to cancel my premium account.