Sorry to answer so lately, I was not there for 5 days...
Yes, it seems to be the bug FS#6904.
I have tried to reproduce the bug with an exact method but I failed to do it during more than 15 minutes.
It happens 4 or 5 times during this laps of time. Even with the today last build.
I was thinking it was the option "the 1st pressed button enable backlight only" which do the problem but it's not the case.
Perhaps the bug is only reproducible after some seconds of played music because (it's not sure) but when I excited myself on the buttons, nothing happened and when I let the player play a music during few seconds and do the trick, it happened more often.
And in fact, I use this function rarely (because I can't survive with no music and a hanged player
) and it was quite always that it hangs on the first try.
I hope it will be useful...
I will post my config file on the bug report if it could help....
edit (perhaps it will help more) : when the "next directory" function is activated, the tag informations are read for the 1st track of the next directory but the player hang sometimes after having displayed the duration time (3:30/3:30), sometime before (time displayed 0:00/0:00). But the next track tag info are never read.
edit 2 : it hangs even with the default settings...