I too have had the problem with my Xbox One controller (it seems like a defect) where the triggers will get stuck and/or there will be something rattling around inside the controller that you can hear. I fixed it by popping off the side of the controller using my fingernail in the seam, and then shaking it. If you do that, a tiny piece of grey plastic will come out. This is what is getting stuck in the triggers. Now my controller works great! If you are having this problem definitely give this a try. Afterwards, just pop the side piece back on and you should be good to go.