The latest I've heard from 10U is that there maybe a timing issue with two commands going to the mount at about the same time. Filippo at 10U reported the following:
"It seems related to a situation where two commands arrive in a very short amount of time, one for synchronizing the position and another for adjusting the mount clock.
We are going to reproduce it in "laboratory conditions" with the same sequence of commands, so that we can debug it - sorry for letting you wait."
I will update as time goes on, in case others with the 10U mounts experience similar problems...........Gunny