Lock after X minutes, failing sometimes

Once in a while I will come back from an errand and find the door did not lock after the minutes I specified. It happened today again and from looking at the door activity and the lock activity. It seems the door did not report that it was opened/closed. The door lock reported that it was manually unlocked though. What could cause the door contact to not report status during the event? Door contact reports 63% battery.

FYI, my kwickset zwave locks go down from 60% to 50% than 0% pretty quickly. When the batteries are low my locks will try to unlock with code but will not lock w/ the motor.

You can do a quick check with the physical “lock” button on your locks to see if it is a batter issue.