Brand new to any kind of bow hunting. I just bought a Mission Sub-1 XR. Ive only shot it a few times but the cocking is inconsistent. I am using the cocking rope from Mission. I am 99% sure I am going through all the correct procedures. I described my issue to their customer service and they felt I needed to take it to the dealer which I will tomorrow. I just wanted to mention it on here and see what yall said. Supposed to be able to cock it in the fire position which it will do most of the time but sometimes when i pull back it will not engage or "catch" and I have to ease the string back down. I pull once again, harder and all the way up but nothing. After that I try it by putting on safety before cocking and so far it works when I do that. I keep trying the supposed correct way, on fire, and sometimes it works and sometimes it wont. It has a decocking button that i have insured is in the correct position. Thoughts??