CRJ 900 autopilot bug

I was just flying the CRJ all was well until initial climb when the autopilot would not hold my desired airspeed. It went well above it, not pitching up to maintain. I then disconnected it and hand flew it up to cruise. When I try to engage the autopilot, nosedive.
Whats weird is that the flight director showed the correct path until AP was engaged. Then everything went wrong. Anyone seen this before?

I’m not sure how familiar you are with the CRJ, but it is not an “autothrottle” aircraft.
The pilot must control the throttles.
If you are familiar with it, did you reduce thrust to climb thrust?
This can happen if there is too much (or not enough) thrust, or the selected speed is too far out of range.
It could also be just an oddball quirk.
If it continues, you may get more answers on Aerosoft’s forum.