When my lifters have this issue, the simple means to a fix can sometimes be patterning the movements when an arm bend is not required, i.e clean pulls.
So, if this issue is happening, I get a lifter to do something like 3 clean pulls followed by a clean. Obviously this is not something you would be doing at maximal loadings due to it being repetitive, but you can go fairly high with it still.
Failing this, another technique I have heard of is hammering the arms into fatigue prior to a workout, like lots of arm curls! Wouldn't suggest this so much, although results have been found doing this. Just thought it might make you laugh to hear lol