A couple of days after my FR245 Music updated to 18.26, I went to play a Spotify playlist, and the screen just reverted to the watch face. Same thing happened for podcasts.
Scanning posts from others with past Spotify problems, I uninstalled the Spotify app from the watch, reinstalled it via Garmin Express, and logged back in via Connect. Now I have even less functionality. All playlists, etc. are gone from the watch, and attempting to add anything to the music library (playlists, recently played, podcasts...) just results in a No Content message.
I noticed this morning that a new software update was available - 18.27 - and installed it hoping that Garmin had noticed and fixed the issue. Of course not...
I have gone to Garmin support chat, and they verified that WiFi is working fine and that the Spotify app is installed fine. They said they would open (or add me to...that wasn't clear) a developer case with the help desk, but I have heard nothing.
I am on version 1.6.8 of the Spotify app, and everything has worked just fine for over a year.