MetaHuman Face Texture Overrides get removed After Downloading Texture Sources (UE 5.7.2)

Development Character & Animation
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Hi,
I’m running into an issue with MetaHuman in Unreal Engine 5.7.2 and I’m not sure if this is a new bug or expected behavior.

When I apply my custom texture overrides to a MetaHuman face and then try to Assemble Character (because I want to export the character), Unreal requires me to download the Texture Sources.

However, once I download the Texture Sources, my custom overridden textures get removed/reset.

This makes it impossible for me to assemble and export the character with my custom face textures applied.

Is this a known issue in UE 5.7.2, or am I missing a correct workflow or setting to preserve the overrides?
Any advice or clarification would be greatly appreciated.

Thanks!