I had an issue once where HB would lag my PC completely for less than a second. This would make the bot think that it was stuck and therefore jumped. It was a few OS reinstalls and HB revisions ago tho, haven't seen it in a long time.
All of my Millz Premium routines have a feature to enable jumping as well, got that un-ticked.
I've had a botbase as well that did this, can't remember which tho.