As far as I've heard, Skripe, this is a pretty common bug (esp with Aimed Shot). I've heard that it has something to do with *rolling* into natural cover instead of just *crouching* behind natural cover. It seems (at least from what I've noticed after hearing that) that if you roll into nat cover, Aimed shot will frequently get bugged and always cancel/interrupt itself, but in crouching behind cover this either doesn't happen, or happens less frequently. This seems to be pretty true from my personal experience. But hopefully some of the more seasoned Slingers here can shed some light on official dev responses/workarounds/etc. HTH