I stopped making my gummies with flower, and now only use rosin. never seen any mold, but I always keep mine in the fridge anyway. There is absolutely zero weed taste!
I have an Ardent and an original Levo extractor. IMO, The Levo kills the MBM and won't chop up your weed. The downside is the little holding pods that only hold small amounts.of flower. The answer to that is a coffee French Press SS filter that fit's perfectly inside the Levo, and no more pods (I was up to 2x double pods).
Levo as a company sux.
I decarb the rosin in a silicon jar (in the Ardent) with a parchment cupcake holder inside for good measure. The Ardent is a game changer imo and will decarb automatically every time..PERFECTLY! Note: it is way overpriced imo and not well made, but it works perfectly every time, and as a company, Ardent has great CS!.
A friend that won't smoke or vape (old nicotine habit I guess), that makes her edibles with Rosin and no more flower. She bought a nice Dabpress presser and an Ardent and is in love without the weed taste to ruin things.