I have the same problem here. I can play the songs from folder but I can’t get the playlist working!
I didn’t know what I was doing wrong. I’ve bought the second unit recently so I could work with it at home (while the first one is built in our band’s gear).
But still no luck at all. After I press PLAY (or footswitch), the hourglass symbol appears for a milisecond and nothing happens.
Now I’m pretty sure that it has to be the firmware issue as Steven has found out.
So I am going to try to upgrade FW (I have 84xx) and see if it’s working. I’ll let you know.