Well, finally the problem was not solved:


In this case, even the weird figure floating in air had movement, like a flag.

The most embarrasing point is that the problem and the solution had been reported... BY ME.
https://forums.totalwar.org/vb/showp...&postcount=171

The number of elements in this model was 14. The solution has been the elimination of three elements: feathers attached to helmet, one sword as secondary weapon (not necessary) and the shoulder pads (hidden by cloak).