C208 Caravan autopilot issues

I’ve noticed the lateral alignment issues where the aircraft is struggling to be smooth with aligning with the nav route. Have to put it in heading in the right place and then reactivate nav.

I fly some missions with a higher sim rate which I still hold 100+fps, but find it seems to suffer the same issue with vertical adjustments too. It blows past the altitude assigned then dives to try and reach it again before going to far, etc