Canvas moving around

I'm coding a program with a color wheel (as a Canvas), and whenever I click the wheel to select a color, the canvas moves up to the top of the screen and covers existing features such as buttons. I don't think there's anything wrong with my code, but I've attached screenshots here. Is it something with my code, or is it a problem on the App Inventor side?

Maybe record a video of your screen showing what's going on.

(Canned Reply: ABG- Export & Upload .aia)
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