What it says on the tin really.

Easy way to reproduce this :

• equip the Glyphic Cloak on a character (SMN AF from DT)
• try rotating the clavicle or cervical bones
• the clothing's ponch itself has a right shoulder, that will never move and remain stuck at the default position, leading to the character's arms and shoulders clipping out of it eventually

For some unknown reason, additionally, the character's right clavicle bone will appear duplicated during this bug.

So far, this bug was only observed on certain DT armors with pauldrons and shoulder capes.