Same issue on Kubuntu 20.04. I've tried snap and apt/deb. The application is very unresponsive and almost unusable. I can select a playlist and let it run for an hour or so until it crashes. Trying to switch songs/playlist will freeze the app. Frustrating as a long-time premium user who works on linux all day.
I am also getting snap version of spotify on Kubuntu 20.04 freezing and crashing my system, only started recently. I can hear the fans inside my PC spinning up like it's about to start a workout. Something has changed recently it seems.