We have this issue on our Paramount ME.
Last Friday evening we got repeated "joysticking" during sidereal tracking, although we completely disconnected the joystick from the mount. This of course ruined tracking and prevented us to register our third extrasolar planet transit ... (sigh).
Looking for a similar issue on this forum, we found a post advising to Calibrate the joystick.
Went through the following sequence:
1. Turn on the mount, connect to TheSkyXPro (build 9334), Home mount
2. Go to Tools => Bisque TCS => Utilities, select Hand Controller
3. Click on "Calibrate joystick", got a message back "Invalid serial command error. COMM_BADCOMMAND.Error=21008"
Help appreciated.
Clear skies
Antoine