Sounds to me that you You have a wiring loom issue. Either the Cam-bus system. This can be a nightmare. I would suggest you do a physical search in all the areas that rubbing could occur. It could be the quickest way of finding the cause. I would start with in the tail area where the cables go past the tool bag under the seat. ( I’ve noticed some rubbing from the indicator cables. Then under the tank. Most common place for rubbing between the tank and the trestle frame. There other places eg left hand side under the fairing near the battery. Why do I know this ? I have had my complete wiring loom replacement because your Ducati dealer mechanic is not the cleverest guy to understand and diagnose a Cam -Bus wiring system they do not appreciate how it works and how multiple senses and signals are shared I have no doubt the right guy with the right training and expertise would find your problem quite quickly.