We are aware of the Apple Music bug in macOS Catalina since Apple dropped iTunes support. We have been working on an update that will soon support Apple Music in Catalina!
Spotify local tracks cannot be launched due to a bug with Spotify AppleScript. We’ll keep an eye on this issue for you and release an update to Skip Tunes when the issue is resolved.
Spotify’s scrubber currently show’s an inaccurate time 🙁 This is a known issue and we will implement a fix when Spotify updates their API.