Rare animation bug (I dont understand it)

Hello!

I'll tell you what happens:

I'm using "Animation Queue" for a weapon on each click (what it does, is that the animation plays again even though it hasn't finished playing).

But, at the end of the animation (or at the end of shooting) randomly the hand position varies, sometimes it is $$anonymous$$gher and sometimes it is lower, I do not understand.

Could someone help me with t$$anonymous$$s? Thanks a lot!