It continues to be disappointing that Tesla can't fix the long outstanding USB media player bugs - especially forgetting the current source/song/position after resuming from sleep.
The early Model S production vehicles didn't have this problem. It wasn't until 2013 when Tesla added sleep mode, that we started having these problems. Initially sleep mode could be disabled - which avoided the resume-from-sleep bugs, in exchange for more battery usage while parked.
Later, Tesla decided to remove the "disable sleep" setting - and now is pretty aggressive in putting the vehicle to sleep (to save battery charge), which only makes the appearance of the USB media player bug more frequent.
Fixing this issue shouldn't be that difficulty - and hard to understand why Tesla hasn't fixed this issue by now. Without a fix, it can be frustrating to use the USB media player when returning to the car after it's gone to sleep - even more frustrating if it was playing very long audiobook...