In 1.12.2t : you can put 1 raw fish in the grinder, get 2 ground fish and tranform them back in 2 raw fish simply by putting them in the crafting grid
The recipe "1 ground fish -> 1 raw fish" should be deleted

Fixed as of 1.12.2u

• Fixed: Recipe: Converting a HC fish to a MC fish now uses listAllfishfresh instead of listAllfishraw to avoid using Ground Fish to make infinite fish