Shadowed Unit Frames problem

So I downloaded the new WoD models client and it seems to be working fine but I have a problem with the Shadowed Unit Frames addon. Insetead of my characters or sometimes my target's portrait, it displays the whole model in the small square and that's really annoying. it's also kind of random, some targets are displayed correctly some or not.
So I wanna ask if that's something caused by the addon itself, and can I fix it in the addon settings or it's a problem with the WoD model client ?
Thanks in advance.
EDIT 1 : This seems to be happening specifically on female humans and male dwarves

This seems to be an old bug. For me it persists on all addons that use 3D portraits. I'd like to know if there's a way to fix it too:<

I've been using Shadowed Unit Frames for years and I've witnessed that same thing, seems much less common for me though.