You are absolutely right. That was the question. And you seem to have to solution. (But I can visually prefer a workaround, can I not?)
Anyway, how did you do it? Did you modify the animation? If so, which one?
And even more interesting, how did you achieve this: "I found a way to disable the fall of loot on the ground, thereby solving the problem in which the loot cannot be picked up"
I have exactly that problem!