Basically, if I don't force-close the Spotify app on my Android before I get my laptop open on the same wifi, the phone will overwrite any play queue on my desktop. I exclusively use Spotify on my phone in the gym. I'll choose one album at a time and play it through while I work out. My laptop is for work - I'll maybe spend 15 minutes every few days queueing 10 or so new albums I want to try. Utterly maddening when you forget to close the app, go to Spotify and you're blasted with gym music and you've lost your carefully curated play queue.