To reproduce:

1. Best reproduced in creative
2. (Optional, but best for seeing effects) Take a blank decorated pot and put it in the survival inventory
3. Take four pottery shards and craft them into a decorated pot
4. The blank pot will share the appearance of the crafted pot, even in the creative inventory itself, but will not have the designs when placed down.

Not game-breaking, but it is a visual glitch.
Relogging does not fix the problem.