Sir, you are a gentleman and a scholar! That is exactly what my s20 ultra was going. I was going absolutely insane with those stupid little vibrations. Before I saw your suggestion, I was able to replicate it multiple times, but I was thinking it had to do with the camera running in the background, trying to focus on whatever I was aiming at. The compass didn't even cross my mind but that is definitely the source of the problem. Mine would go on for hours just vibrating, I was getting to the point where I was about to throw my phone off a bridge and move off the grid, but thanks to you I now know how to end the problem as soon as it starts.
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