I have encountered some problems with certain aircraft that use an auto-trim system, as is common in some fighter jets.
As soon as I activate the autopilot in these aircraft, only the vertical mode works, but the lateral mode does not. When I activate the lateral mode, such as HDG mode, the aircraft would spin wherever it wanted and eventually ended up in a dive.
I tried a lot of different things over time and eventually discovered that the autopilot worked perfectly as soon as I unplugged my Throttle Quadrant (X56) from the USB port, but not when it was connected. At first, I thought, "Oh no, my throttle, which was barely used so far, is defective." To confirm that, I created a test profile in MSFS24 in the control configuration and assigned the axes and buttons directly through MSFS24 instead of using AAO. And then everything worked perfectly fine. I also ruled out any double assignments of the axes, since the profile I usually use is completely free of any assignments, as I try to find a solution for everything in Axis and Ohs, which usually works well.
Has anyone else ever observed such a phenomenon in relation to auto-trim systems and AAO? For all other aircraft, AAO works perfectly, and I encounter no issues.