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I took my Aetherial Crown off of one of the mannequins in my house in Windhelm to see how it went with Emperor's Robes and forgot to put it back before I left for a quest. When I returned, I noticed there was an Aetherial Crown on the mannequin and one in my inventory as well. To test if it would happen again or if it was just a one-time thing, I removed the new crown and left my house again. When I went in, there was yet another. I also tested this with some Stalhrim Armor and got the same results. Did they un-patch the duplication glitch or something? Does it work for anyone else?