PeteFly82 wrote on Feb 23^rd, 2021 at 10:13am:

when in autothrottle-mode, the thrust-levers are shaking heavily, stuttering slightly forward and slightly backwards all the time, never had such a heavy thrust lever stuttering with other add-ons, neither CS nor otherwise.

Might be both hardware(controller) and software(AT) are both trying to move throttle lever
this have been request for a while: https://www.captainsim.org/forum/csf.pl?num=1572389914