After some testing I found that folders with 260 mp3-songs play ok, but with 300 songs the whole watch freezes as soon as the folder or playlist is selected.
I tested both calling up the songs via a preconfigured playlist as well as via the 'Genre-Category' ... both lead to:
- Buttons do not respond anymore
- Display-On-Detection does not work anymore
The only way to revive the watch so far then, is a 'hard reboot' (15sec-Power-Button-Press)
The identical music library works fine with all folders and genres with a lot more songs on my 'old' fenix 6...