I had a Cavalier Fractal Capacitor with Ascended stats, and I threw it into the forge using the recipe with 250 ectos, 1 Glob of Coagulated Mists Essence, the back piece, and a gift of acsencion, and in return I didn’t get the Beta version but a quiver. I don’t recall ever transmuting my back piece, so I don’t think that’s the issue (It’s too late now to see if it was transmuted or not).