In particular, if a mod registers an ore name without registering any items under that name, the condition will still pass despite this ore ingredient being unsatisfiable.

I propose replacing the check for ore name existence with a check for the existence matching items:

return () -> !OreDictionary.getOres(ore, false).isEmpty();

This fixes issues such as phantamanta44/tinkers-evolution#8, where Avaritia uses an ore-exists recipe condition to register fluxed electrum singularities despite there being no items matching the blockElectrumFlux key.

This has been sitting here a while, but unfortunately, 1.12 hasn't been supported for a really long time.