Question about SureFlap Connect Hub

What do you mean by rattling? The cracking sound when the distance sensor is activated or when the plastic door comes up against the wedge?
Firstly: It is possible that other animals (including insects, snails, etc.) trigger the activation of the flap, simply clean/shoo them away briefly.
Secondly: Draughts, vibrations in the environment, wind. The flap makes no noise from any of these.