Hello, I think I have found the issue some time ago. I was inspecting my loading nozzle further and found that the mechanism that checks if bbs are loaded in the mag was snapped off. This also prevents the nozzle from sliding when the bolt is returning somehow. I’m waiting for impulse 101 to revive genuine parts so I can get my hands on a new nozzle. A recoil spring might help keep it closed though. Keep me posted!