Don't all 400h rear hatches lock automaticly? As soon as we begin pulling it down ... it finishes the trip all by itself, if we haven't shut it all the way by hand . . . then, the auto latch can be heard engaging. Perhaps if the auto door open/close function is out of whack, you have an issue ... but otherwise?
Well, I haven't closed it manually myself, always just push the button, and then I hear/see the automatic system close/lock it. She apparently closed it manually, but not all the way, and the automatic system didn't finish the job. I'll have to verify this can be done but I think it can as she did it.
In any event, it appears we have to be diligent about making sure all the doors are closed all the way.