It sounds like it's time to change loop material, or make sure you're getting the ends melted into bigger balls. And, it's time to learn to check everything on your bow before each practice/hunting session!! A shooter should look his bow over every day, when shooting, for any signs of abnormal wear and tear, any cracks, loose parts, frayed string/cable, etc. And don't just look at the screws/bolts, use the allenwrench and check the tightness with it!! Same goes for your arrows, especially carbon, they need inspected periodically, especailly if your missing the target every now and then!!