When importing Surfaces from another file using the Attribute Manager, any texture images that are located in the Embedded Library are shown as missing and will not be imported.
I don't recall running into this issue in the past, I think it's new in 26.
not new. it never did.
Exporting surface attribute only exports "associated attributes: but won't include any embedded image. if you had the image embedded, try moving to the shared lib folder or exporting and importing into a new project.
The textures are still linked to your surfaces.
It is just you need to load the library that contains the texture images - that is why they are missing.