This is a bug that affects dyes and slabs. In the crafting table/crafting menu, if you try crafting a dye, all dyes have a file name instead of the proper dye name. Same thing happens with the slabs. In the Stone Cutter menu, if you try to craft a slab the name in the menu is just a file name.
MCPE-4324
Dye and Slab bug
Resolved
Duplicate
1
Duplicate of MCPE-2464, please use the search function to see if your bug has already been submitted. Currently over 60% of tickets are being closed as duplicate.