ZBrushCentral

Normal map issue

Hi.
So I have this face model divided into 3 polygroups ,that i baked in substance painter, so the lips don’t project on top of each other. Until now everything is fine but I want to pose the face in Zrbush and in order to do that I need model to be homogeneous. So I welded all the points on polygroup bordeds maintaining the UVmap but when I take this model back to SP and apply the normal map it creates those really visible seams. Is there a way to either get rid of those seams or to pose a model without having model to be homogeneous?

https://imgur.com/a/owmMFxd image of seams