I know that aroma and yeah same thing, I'll start looking for mold that's not there.
I think it's a combination of water activity maybe being above 15% when you want it around 10-12% after drying and natural terps and degradation happening while drying and curing.
Initially over drying and using something that has humidity control locked up like Boveda or Grove bags for the cure will in a way, rehydrate to the proper range and eliminate that aroma leaving you with raw terps. The buds will often have very little aroma while intact but once broken up, unleash a wrath of stinky stank like opening up a dirty diaper.
To be 100% certain it's not mold, I use a UV light or blacklight and shine it on the buds while they're intact and after breaking them up. If you see anything glowing with the light on it, that's mold. No glow, it's safe.