That's the one downside to Litchi: when signal is lost, even though the mission continues, you lose manual control of the gimbal. I believe, however, that you can preset changes to the gimbal elevation as part of the mission even during signal loss, or preset the gimbal elevation you want maintained during the signal loss, through manual gimbal control just before the signal is lost. Since it is a Litchi mission, refinement and improvement on successive missions is easily possible! Good luck, and let us know how it goes!