Autopilot Issue

Hi everyone, I have noticed that when activating my Autopilot in flight, the plane always bounces up and down. I have tried doing it by pressing the AP button or by setting the Vertical Speed button to the vertical speed im going up at and none of these work. It always bounces once I activate autopilot. Is it only to me or you guys go through the same?

Turn your power down. You’re probably going too fast for the AP.

Your actual VS might be way higher then what your set VS is. Try taking off manually and manually control your VS to about 2500ft/min then hit the VS button. See if it resolves your issue.