Why does the sashes "slip"?

[vandaa95 1530]

I have some sashes/wings which are on the char's waste, not at the top of the back. When I wrote other positions in the item_scale it looked better, they was at the right place. But when i was running with the char the sash/wing slips right, left, and slipped in the character. Do you have an idea why?
This is the wing after positioning in the item_scale and down there the original position with the original item_scale: 

 

Spoiler

Edited September 4, 2022 by Metin2 Dev
Core X - External 2 Internal

[Cappuccino 52]

Have you implemented the item_scale.txt in your client?

Probably coordinates are wrong in the item_scale.txt file or you should change the coordinates offset in your client source to move the wing

[vandaa95 1530]

yes, I solved. I moved the pivot point and the original item_scale is good.