The Movi works well when I'm using just my iPhone X. When I put on the Moment wide-angle lens and counter weights, it worked just fine the first time I did a simple walking test. But when I attempted to repeat the test again, the Movi started shaking and vibrating and the iPhone screen was extremely jittery. And so I turned it off, waited 10 minutes. I put the Movi on my desk and turned it on and I got the same issue: loud humming, jittery screen and intense shaking. Anyone know what's going on?