NOt sure, but just a thought. Try being a little rough with it. Ie maybe slam the thing down?
Kinda funny because I have a problem with my touring where the 3rd row gets stuck down.
When trying to pull it up, the damn pull handle popped out, now continually pops out with the slightest bit of force. Anyways, to get the thing Up i have to "reef" on it pretty hard to get it to unlatch.