BUG report：Error in UV mapping of T-80BVM

In the T-80BVM in War Thunder, there seems to be some kind of anomaly in the UV of the body and I can't preview it properly in Substance 3D.

On the site the model is shown correctly. But in some places there is a jitter. Perhaps there are two layers of meshes.

On the site the model is shown correctly. But in some places there is a jitter. Perhaps there are two layers of meshes.

The preview of the model does work, but the preview of the mapping is abnormal, can you fix this please?  : )

The preview of the model does work, but the preview of the mapping is abnormal, can you fix this please? 

I don't know how to fix this yet.

I don't use Substance 3D and can't figure out what the problem is. In 3D Studio MAX the model is rendered correctly.