Contact Sensors Going Offline

Out of the blue my front door sensor will go offline then go back online all by itself. It will also say door open when it is not. Which has caused false alarms. I have removed and re-added the device I have replaced the battery As well and it still does it. It’s in the exact same location as it has been since October last year. I have seen some posts about base station too far away but it has worked just fine until recently.