A few suggestions:
Battery Problems?
Make sure you are turning off the player when you are done listening, not just leaving it on Pause.
Maybe check your Power Saver Setting. I use “5 Mins”. Will autimatically shut off the player if left in pause mode for 5 mins
Maybe try using a different micro USB charging cable. I always get best charging and data communication results with the micro USB cable that came with my Clip Sport.
2000 Song Limit in Music Database?
Maybe take a look at all the replies in this long message about beta Firmware 1.28 in the SanDisk Forum for Clip Sport
I think the 4000 file limit allowed in the beta firmware is a good match for the file capacity of a 32gb micro SD card.