Some items have texture's that I'd assume somehow overlapped or something. The books, cooked beef, cooked porkchop, salmon (raw/cooked) And all enchanted books
Linked issues
Comments 4
Possibly a Duplicate of MCPE-12498 and the comments there.

This bug has already been reported! Please go here -> (MCPE-12498) and make sure to do a quick search for your bug before just writing a duplicate ticket. Currently 48% of resolved tickets have been duplicates!

This bug has already been reported! Please go here -> (MCPE-12498) and make sure to do a quick search for your bug before just writing a duplicate ticket. Currently 48% of resolved tickets have been duplicates!
Possibly a Duplicate of MCPE-12498 and the comments there.