It's far from new behavior for Spotify, though. They've been constantly twiddling with UI, algorithms, etc trying to optimize for profit margins over user happiness for years at this point. Last I knew their entire engineering structure is optimized for that, with the desktop client for example being carved up into wholly separate iframe "islands" (complete with dependencies in duplicate, triplicate, etc) managed by different teams to allow A/B testing of each pane without communicating with the teams responsible for other panes.