In the file you provided for download, on the material "Body" the Image Texture node containing the normal map "Body_Normal.png" is set to Color Space > sRGB. If you change this to Non-Color everything looks fine.
By the way, all textures you have there (Metallic, Roughness, Normal, Alpha, Displacement) are better used with the Non-Color setting (except for those that really contain the color of the material, like Base Color in your shader). In some cases, the sRGB results might look better, but usually not.
And I only checked this material where you had an issue with, you might have the same but not noticeable in other materials as well.