After testing tonight with several settings and swapping controllers, I finally made progress in tracing down the issue and it seems to be solved.
Just to clarify. have a Hotas warthog, CH pro yoke (with single throttle lever) and pedals and normally next to it a logitech joystick for drone purpose only.
Now hopefully the solution to the problem I got. My CH yoke is often not working directly in MSFS 2020 when i wanted to fly. In device settings of W10, it is then stated unrecognized. So what I normally do is pull the usb plug and reconnect.
The last time I did this was it not working again and therefore try to remove the warthog and the logitech. When reconnecting the warthog and logitech, I didn’t pay attention enough when MSFS 2020 asked: Do you want the default or current setup. What I remembered now is that I have chosen DEFAULT.
The result of this, both warthog and logitech have default throttle, and display setting etc. So when i reconnected the next time the logitech again the small throttle lever was in mid position and that caused jumping.
I have still to check settings in various profiles but hopefully that solved it…