Damnit, I hate when fixing one problem creates another. No, not a joke; it's a bug. I thought I tested all scenarios, but I must have missed something in the last update.
May I know what mod settings you have enabled for Reverse Factory? Also list any big mods you may be using (such as bobs mods, angels, AAI, pyanodons, yuoki, omimatter, etc)
Alright, I figured out the issue. Seems that either bobs or angels completely changes the internal naming and structure of recipes, which breaks my recycler logic and defaults the products to nil (as a side effect of my latest update). This new structure isn't wrong, but it's very weird.
I have changed the logic to check for this structure of recipe now. I have tested with bobs+angels, and with mostly vanilla, and with the safety toggle on and off. Should be working as of v6.0.4