This may sound like a stupid question, but do you think we could be pressing the button in different ways? Could you, perhaps, be accidentally "catching" the centre button as you're pressing the direction buttons? That's honestly the only explanation I can think of which could account for this! I'm not kidding when I say that it's literally never happened to me, and although the time I spend reading isn't at your level, I do spend a couple of hours a day reading, so my Gen3 gets a good "workout".
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