Thanks for caring about these other mods, testing…
I was using a custom build of TE with calls to its SmelterManager.addDefaultRecipes()|loadRecipes()|refreshRecipes() during init commented out, which let me work around the most common place where I’d see collisions.
It meant only 3rd party mods using TE’s API to add recipes to the TE Induction Smelter would show up in NEI (like ExU thickened glass and ProjRed red alloy ingots), which was fine since I don’t use TE machines, only its tools and such.
It would be the TE-custom in this matrix:

While I can at least leave HashFix on now, I can still trigger it by adding ExU + letting the induction smelter load its recipes.
Hmm…