Unless you’ve disassembled carbs down to each and every individual component and scrubbed, poked and flossed them, along with replacing all rubber O-rings and seals, your carbs are not factory-fresh clean. Your bike will run like brand-new model off showroom floor when carbs are factory-fresh clean.
Check out
this thread for photos and procedures on how to get carbs factory-fresh clean. Do search here for “clean carbs ducatiman” to find threads with similar symptoms to yours and how to get bike back to brand-new showroom condition.