Wait a second, she wears BRACES? I only noticed now.
No, dude, some others do have a visual bug, but these are actual braces. Unless you made/commissioned the model yourself, in which case you surely know better than me
I make all the scenes myself :-)
In this case it's a shader thing, up close it looks normal, from a distance you get... that.
One of the reason I make the models & render in Blender now :-)