rear hatch water drain mystery !

so out beautiful Primes have the super funky and aerodynamic valley in the rear hatch glass.
which funnels alot of water to the middle as it runs down.
along the bottom edge of the glass is a rubber seal edge that transitions to under the rear spoiler.
right in the center where most of the water is going is a little opening in the seal edge for enhanced drainage.
my question is , where does the water come out?
i have already lost several bits of leaves or other debris into this opening, as well as other bits lost along the seal edge, as it seems to be open to under the spoiler along its whole length.
my concern is eventually the drain channels get clogged, and water fills up inside the hatch and goes places it shouldnt.
anyone discovered water dripping out of the bottom edge of the hatch after a wash? any mysterious openings with debris stuck in them?