Here is the response from tech support:
I performed a flight test and have to say that the control's sticks don't respond because Solo has a mission to complete (follow me smart shot), the only way to have the Solo responding to the control sticks movement is pressing pause/brake on the Solo controller in order to interrupt the trajectory. The smart shots of your solo are working properly.
Please, let me know the best time contact you to perform a complete inspection of the unit.
Thank you for your patience and preference.
Regards.
3DR Technical Support