Door sensor bypassed automatically

Hi there @user_ad3c74 and thank you for connecting with us here on the Xfinity Support Forums! According to the documentation I have, bypassing a sensor is done by the customer, I don't see anything regarding a timeout function for sensors. 

To see sensor statuses and bypass them:

• When the system is disarmed, on the Dashboard, tap the Security shield.
• If the system is ready to be armed, the Arm System screen displays. Tap View Zones. If the system is not ready to be armed, you'll go directly to the Bypass Options screen.
• The Bypass Options screen shows the status of each sensor, such as whether a door or window is open or closed. If there's an error associated with a sensor, you'll see an alert under it. Tap Bypass to have the system bypass (ignore) a sensor. When bypassed, the sensor won't trigger an alarm and no rules you have set up for the sensor will run.

If you're concerned the system is not functioning properly, we can troubleshoot the services and schedule a repair technician if needed.