Lock schedule not working

My wife has a daycare and I programmed my yale touchscreen lock to have a pin that only works during business hours with my new veralite. Every few days, the code no longer works and I have to delete it and re-enter the pin and schedule. Is this the lock or the veralite? Where are pins with schedules saved, the lock or the veralite? Is the veralite sending the lock the pin and then deleting on the lock every time the schedule changes? This could mean a tx isn’t always getting through. Thanks.