From #121 (comment)
One thing i noticed while investigating this:
Before when you disable a recipe, the item row is emptied. Old projects still have this state stored:

If i enable them now and disable again, i get the recipes visible: 
I'm not sure if this was intended, i tried to go to older versions along the master branch, but couldn't find any yet without this problem until i ran into the ones with the libf problem.