Aurender Conductor occasionally will not play next song....

Searched the threads and couldn't find anything on this.  My apologies if this has been covered.

I have an A10 and my friend has the A100 Aurenders, both of us have noticed that sometimes we put a song in the queue, and it won't play.  Even after manually touching it, it will skip over the track and play a different song.  Has this happened to anyone?