Update: i flew again the citation longitude today: You can not have a/t on for longer. It disables itself so so so often (and than it does not stop yelling “autothrust” until you turn it on / off again). Today I thought, I have seen a warning message in the pfd of the g5000 in the moment A/T disabled itself. It was away before I could read it.
I am not sure if it is a symptom of the avionic crashes we see on PS5 regularly. That’s why i am telling this in this thread too.
I made a topic on those A/T disabling issue. Please contribute and vote for that issue also if you habe that issue too:
https://forums.flightsimulator.com/t/autothrust-disengages-itself-randomly-on-ps5