When cycling a redstone circuit with repeaters, the cycle will randomly stop and the repeater will have a charge when there is no input. The circuit cannot be reset unless the repeated is removed and replaced or the entire circuit can be flushed of charges. This seems to be a noticeable lag when the charge enters and leaves the repeater leading to a situation whereby the redstone is cycling normally but the repeater is getting a charge after the redstone is not longer charged and the charge in the repeater does not dissipate.