Decks Suddenly Not Syncing

I've been using TP4 for 4 months and have never had an issue with sync. But recently, I seem to be running in to issues where my tracks won't sync. I stream off of Beatport, and usually add my BP playlist as TP4 playlist, run analyze and we are good to go. But lately, the other night especially, in the middle of my set, my tracks stopped syncing. The indicator of the track I loaded up to play next would turn red and no matter what I did, or what tracks I selected, it would not auto sync. I feel like I've only had this issue when not letting my tracks fully load, or my computer went to sleep, but none of these things were the problem. The issue corrects itself when I restart Traktor.