SSE Custom race mod converted from Oldrim uses default face textures

[JennyPricefield]

I converted (only converted, by loading it in SE Creation Kit and saving, I didn't make any actual changes to it) a race mod I made for Oldrim to SE and instead of using custom textures assigned to the race it uses the vanilla face texture (or whatever texture is replacing it). This only happenes with the face, not the body or the hair, and it never happened with Oldirm. Switching chacrater's face complexion in the character editor fixes this but after loading a save or opening the editor again it resets back. The problem isn't with the face complexion texture - it can be switched back with no issues until editor gets open again or a save is loaded. The only solution I found other than switching complexion every time is replacing vanilla face textures with the race's textures but neither of those two is really good. What could be the problem here and how do I fix it so the race uses the textures it's supposed to use from the start and doesn't swtich off of them, like it was in Oldrim?