Activating Autopilot with no mode selected during takeoff crashes plane into ground

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Brief description of the issue:
When i am taking off and press AP during the climb, normally i expect the Aircraft should be stable heading in the previous direction and climb. What happens is that the AP tries to turn right and let the aircraft crash into ground. I this normal ?
I expected that autopilot activation with nothing else engaged should hold pitch and bank !
Aircraft C208B

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Detail steps to reproduce the issue encountered:
Just takeoff and press AP without any mode.

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Build Version # when you first started experiencing this issue:

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This was a misconfiguration in the Brunner YOKE. Feedbackloop when in AP Mode !