Smooth details and texture problem

[ttemuka47]

Hello,  I'm importing the OBJ from Marvelous Designer into the ZBrush. If I smooth the details, or sculpt - textures become distorted on these details - when I apply Normal Map in Keyshot. Do you know how to fix this? Thanks
Here are screenshots. On the first photo there is smoothed obj model, second is without smoothing in Zbrush.