I got it working once. As I don't prefer to charge my watch all the way to 100% and Ultra has larger battery, I was careful about not charging more than 80% in the beginning. After a couple of weeks my watch stopped charging beyond 80%. One day I had to charge it fully as I wasn't coming home same day. That was enough for the watch to change the rhythm. It doesn't stop charging anymore. Wish I could preset charge level for my watch and mobile. Even an automation could have been easier.