I installed a GRT III trigger in my Nitro Venom and after about 40 pellets it has developed a problem. When the rifle is not cocked it feels fine, it is under spring tension and not loose. When I cock it there is all of a sudden no tension in it's resting position, the trigger blade is very loose, it will flop around, it feels like it will fall out, hard to describe. However it still shoots and the safety still works but it is definitely not right and much different than it was. I have not pulled the stock off to see if there is anything obvious wrong. I am just wondering if anyone has experienced this or has any ideas of what may be going on.