1200 songs gone

did you lose just your playlists or the actual data? Was it on a card or internal memory? I have never lost my data as part of an upgrade but I keep my data on my SD card.
 
all my playlists empty after latest upgrade !
What app do you use to play those songs? It's possible that the app got updated during the OTA, clearing out its cache and data.

Sent from my rooted, debloated, deodexed Sinclair ZX-80 running CM 10.2 using Tapatalk 4
 

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