I've been trying to fix this for about an hour now.
The textures looked fine in Blender and Substance painter
But when I exported it into Sketchfab it got messed up. I had a previous test of the same model, and I've noticed that it had a little bit of uv stretching on it. It got way worse with the next export and all I did was move some stuff around after
I've tried fixing it by reunwrapping everything, rebaking, and reimporting. It only seems to be affecting the gold material, I have the same gold material on 3 different objects and it only affects those. Have any of you ran into this problem before? Here is the model https://skfb.ly/6sJIx