That doesn't look good, thanks for reporting! Do you by any chance (still) have the .model file you could share? That way I can figure out what's going wrong.
Viewing post in Texture is different size after exporting
Actually, this same thing also happens when I just save and load .model file. Texture size is set to 1 after reload (when I saved, it was at 0.1) no matter what I do. I found out about this yesterday while working on something else so this .model is just me testing if it happens again, and it did.
Anyway here is a link to the .model file. Hope it helps :)