Random Shutdown Bug, DIFFERENT from the power switch issue

Okay, I’ve isolated it to a specific, repeatable procedure.  It happens alot when I’m going to bed listening to it, and I do the same things before I go to sleep.  I’ll turn my Fuze on, press play to resume whatever song I had paused before I last turned it off, turn the volume down to or near the lowest notch, then immediately go to settings and turn the backlight time to 5s and the brightness to minimum.  Shortly after the screen turns off, the music will stop and the Fuze turns off, and won’t come back on until I reset it via holding the power switch for awhile, releasing it, and turning it back on again.  Once its finally done refreshing my database (takes awhile w/ an 8gig card), my settings are back to what they were before.  I turn everything back down for “sleep mode”, and either pick a playlist or play all, turn the volume down, and it plays fine with no further problems.  Anyone else had this issue?  Is it a bug, or is my Fuze defective?  Thanks for the replies!