[PROBLEM] Binding Skin Changes Material on the character

Hello, I have a certain problem with binding skin to a skeletal mesh in Unreal 5.3

After binding the skin, the materials on the character change and I don’t know why.

I imported the character from SketchFab in .glb format, tried .fbx but the same problem occured.

It’s imported in separate parts, I put them all in the game enviroment (except the weapons) and then I merge them using Merge Actors. I convert that merged Actor into skeletal mesh, make the skeleton, and during Binding skin the problem occurs as shown below:

Before binding skin:

After binding skin: