Mine never done this, until the door was stripped down and put back together on a new door.
I think there is a mechanism that makes them go down if they hit something, so i suppose its possible something in the regulator is making it go to high, so it thinks it needs to go back down.
But also dec has this problem with his total clossure alarm, and was told that it was the door lock, as its all air fed.
So not really sure, but i know its a comment problem.