FBW Stable 32NX Autopilot

There are no threads about this since earlier in 2022 so I don’t know if it’s a new problem or if i am being naive.

I have never had issues with the AP disengaging. Yesterday, shortly after TO it did and much to my amusement, I flew Darwin to Brisbane manual (Don’t ask me why)

I was able to re-engage AP shortly before landing.

What can cause this? I was not overweight, I know how to configure this aircraft better than any other. Yoke dead zones were a possible cause yeard back so I looked at this.

Just would not under any circumstance come back on. The aircraft was stable when i was trying

Yesterday I made a flight with the AP engage, it worked fine until the last sections of the STAR which disengaged and also disappeared the information on the FMS and consequently on the screen. I have no dead zones on the joystick.