Angel of Attack wrote on Feb 23^rd, 2021 at 1:42pm:

PeteFly82 wrote on Feb 23rd, 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

well, I guess that is causing the problem.
thx for the fast and helpful answer!