Just did a quick test on my 2007 hatch. The hatch is roughly 1 ft open before it wants to swing down to close. At that distance it will not latch securely on it's own. It will close, but not fully latch, unless I add some momentum to it. I tried it 10 times. All ten with the same result. Not fully latched.
Now that's European engineering....
I'll keep slamming it until I whine about it to my mechanic.
46 & 2 just ahead of me...