Jahvansi's sprites (Arcane)

[Marko]

I have a big issue on comprehending his left arm.
It looks displaced, i am not sure why but i have two theories why it might be.

First theory is that upper part of arm is a bit too long and curved in wrong direction (or highlights indicate that way), i think it should look as straight as possible even in its shadow. Plus whole shoulder is displaced, a bit too low?
Second theory is that the highlights of bicep, tricep (etc.) are wrong. As far as i am understanding the pose, i think bicep should be seen faced to us, rather than from profile like it is atm.

There is also a third theory and that is that's too late and my brain is just not capable of comprehending the pose, but you have to agree that it looks a bit odd, doesn't it?