Metahuman Hair Issue

I attached a MetaHuman Head to my custom character and the hair became orange after I started the game. (It rendered correctly in the viewport though)

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I deleted the LODSync component and it showed correctly when the screen size is big enough but it disappeared when it was far away from the camera.

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I think it’s a LOD Issue but I don’t know how to resolve it. May you guys help me? >_<