[x21]Luffy

Hi, basically the bug is, when i'm aiming, it goes down automatically, any idea about how to solve it? second time it's happening, last time i just re-started my pc and run again MTA and it got solved, now i've re-started my pc about 5 times and nothing changed, here a fast video showing it (the video quality is crap because i choosed the minimal one to upload faster the vid on youtube)