Which version of the app are you using? I had the same problem with my Dakota Driveway Sensor and also use and Ecolink sensor, but mine only repeated 2 or 3 times. I set it up in the classic app with the “Notify me when” SmartApp and at the bottom of the setup menu there is a “minimum time between messages” selection. I set it for 5 minutes between messages…problem solved. Not sure if you can do this with the new Samsung app.