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Normal map & lighting issue

So im trying to import a mesh and textures i made and i’ve got everything in and working except for the normals. I’m assuming that i’ve baked the normal map incorrectly for UE4 but i wouldn’t know for sure. I’ve included a screenshot of the issue as well as the material node setup and the uncompressed normal map (imgur link cos normal map is 4k). If anyone could give me some guidance on the cause of this issue and how to fix and avoid it in future it would be much appreciated