Basically the same issue as this thread

On version 1.1.24. 

The Tizen Spotify app for the Gear Fit 2 Pro is incredibly broken. 

After downloading one of my offline playlists onto the watch over wifi, any subsequent updates will not sync. The app will show the "Downloading" status bar and say the songs finished downloading, but the moment I turn wifi off, the songs are unplayable. They do show up with the green download arrow, but clicking on them just plays the last song in the playlist that was downloaded with the original sync. I've also noticed, the most recent unplayable song doesn't display on the screen correctly. In offline mode, it gets cut off by the bar at the bottom which doesn't happen when the watch is connected to the internet. 

I've tried all suggested workarounds in the previous thread and the only one that works is completely uninstalling the app from the watch, re-downloading, then re-downloading the playlist which is not really an acceptable workaround.

Please advise.