Who Me Too'd this topic

Okay, so sometimes I will play Spotify from my computer (MacBook Pro), and my phone (iPhone XS) will literally start saying Spotify is playing on my Mac. I do not mind when the phone and computer sync, but if the app is NOT even open on my phone, I do not want it to. It's annoying because I'll be playing from my Mac and then it'll just automatically blast my volume on my phone. I just do not understand why it is doing this when the app itself is closed out from the phone (and yes, I mean closed-closed. Not just on a different app with it open in the background). Hopefully, this made sense. If anyone can help, thanks!