Jagged Edges & Outline on Pen Path in Substance

Hi! I'm a video game texture artist, and I'm having this issue where the Pen tool path on the golden and silver elements has some sort of a white outline and jagged edges in-game. Played with the height and the metallic values a lot, but it still looks bad in the game, whereas it looks somewhat decent in Substance, but not quite how I would like it to be. Textures resolution 2048x2048, export as TIFF. It is a mod for the game WWE 2K24 and it runs on Unreal Engine 4, DirectX 12. Would any of you have a fix for this? Thanks in advance. 🙂