The central station is saying a trouble notification is being triggered on a door sensor. I don't see anything on my panel of a problem or on the alarm.com history. They said it's not setting an alarm off, it's just signaling trouble. It's only happening with one of the sensors and not the others. I'm arming the panel "stay" with the keyfob and it's bypassing this sensor and this is when I get the call. Is there anything I can check on this?