Yesterday when I would sync music with Spotify, it will get a decent way through the process and then suddenly "Sync failed" (or something like that) would show up on the screen. The problem is that it began flashing erratically, and the only way to get it to go away was to repeatedly press the top left (start) button. Even holding the top right (light) button did not allow me to force reset.
One thing that seemed to fix it was to turn it off/on. No issues since, but it seems very odd.
Everything on my watch is the most recent update as of 6/26/2022.