It´s not really an issue of elbows dropping. It´s more that if i retract my shoulders, I lose “the shelf” upon which the bar rests. When retracting my shoulder the bar will be resting on the upper part of my humerus instead of the deltoid and thus, I can´t support the bar.

I can however, when I protract my shoulders. But from what I understand this is an unstable shoulder position for front squatting?

Wrist/finger mobility is good, I tried both wide and narrow grip.

Thanks!