Migrating to a Game Feature plugin can result in assets' losing references.
"Migrating assets to a game feature plugin's content directory leaves them having invalid references, editor thinks they reside in "/Game/..." instead it should've pointed to "/GameFeature/..."
The only workaround I found was to migrate to main project's content directory then move them over to the GameFeature's content directory "
The Texture Sample node is referencing the correct Texture
The Texture Sample node no longer has a texture assigned
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-157036 in the post.