Altitude hold shoots up my quadcopter

Hi, im new to quadcopter flying. I am using apm 2.8 with external GPS (no sonar attached in my quad)and I am just wondering if is it normal that when I switch to altitude hold mode, Position Lock mode, or RTL my quadcopter shoots up.

Attached is the graph of my altitude hold mode test flight. Thanks!

althold.jpg

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  • 1 post logs, not graphs.
    2 if you Google it, you'll most likely find it's due to much too high vibrations.
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