Be more positive/committed with your foot. If ever I end up knocking into neutral accidentally it's because I'm being lazy and not fully selecting gear when shifting, not moving the foot enough. Doesn't ever happen when I'm setting off from traffic lights for example but if pootling it's a bad habit and one I get annoyed at. I end up apologising to the bike for making her rev in protest unnecessarily
I doubt you'll find much info on it, it's more down to rider error I would have thought. And try using the term gear lever, you're on a bike with an engine now
