Clip+ freezes then all files are lost

Occasionally (every other week or so) my Clip+ freezes and I have to hold down the on/off button to restart.  When I do this, all of the music and audiobooks disappear and the files are empty.  Just as if I reformatted the device.  The firmware is up to date. Any ideas?

I would try reformatting and then reapplying the firmware, and then see if that fixes matters.  Hopefully, it’s just a firmware corruption issue.