hi, loving timefactor(serial tf-0090x) to death but have an issue with tap tempo. when the unit barely inputs right tempo, for instance i tap for 120bpm speed and the unit will display 60bpm. it takes a several attempt to get it right. I also have tried external unlatched switch but the same result again. i saw another user had the same issue and i was wondering whether it's a faulty unit or it is a generic timefactor issue that will be fixed in future update? any help would be appreciated. regards