Unfortunately, it seems the release button a kind of error in the design to give.
With me he broke down twice within four months out of nowhere. Break in the middle, the remains will be shot out of the spring.
Since the black housing used to no action shots and the trigger anyway almost never pressed is (almost always control via app), I can only come from a design flaw.
So far, the case has been replaced by the dealer without objection against a new one - but it is always annoying.