Reply to weird bug with s4 and latest tractor

Hey, last evening i was at my gig early in the evening using the S4, and the latest traktor update. i was about 10 songs in and when i tried to load a new song into the left deck it wouldn't load and from that point on it wouldn't allow me to load any other tracks. the left deck was completely frozen. I even tried to enable deck c + d and use those but this wouldn't even work. The right deck never stopped playing but i had to restart tractor for both decks to work again properly. Anyone have this issue?