Well that is strange. Have you checked the status of the door on the garage page in Alarm.com? When this happens is the door reporting that it is open after it opens? Or does the app show the garage door as in the wrong state?
Also: How long have you had the MyQ installed? Has the controller been working properly for a while and only recently started doing this? Is it new and is predominantly malfunctioning? Has it been a long time and only happens once in a long while?
If it is the 821LM using a tilt sensor, I would check to make sure first that the orientation of the MyQ Tilt Sensor on the garage door is correct. “Top” is written on the side that should face up.
Do you have more than one door connected? If so does this happen to both or only one?
There is no way I am aware of to adjust the sensitivity on the tilt sensor. As it looks to be a simple ball switch, you might try very slightly adjusting the natural tilt of the sensor as it rests on a closed door to see if you can filter out the problems with vibration.
Replace the tilt sensor with a more reliable DW10 and overhead garage door reed switch.
Problem solved.
Honestly, I don’t even know why people use that trash tilt sensor… its prone to false alarm, a strong wind will set it off even… very unreliable sensor.