Yeah - I just grab it by the little black handle and slam the glass, because it takes quite a bit of force to fully latch closed - it feels like I'm at risk of smashing the glass. I'll try pushing on it next time to see if it's a less violent way to close the window.
Pro tip from somebody who owned a 15 year old station wagon with an identical rear window / wiper motor design: lubricate that little metal plunger that's attached to the wiper arm with some kind of corrosion-resistant spray 2x yearly and operate it by hand to make sure it's not seizing. I use white lithium spray, but somebody can tell me if that's a bad idea. Perhaps silicone spray is a safer option as it's dry.
That little spring loaded metal cylinder that allows the wiper arm to be safely misaligned when you close the window is prone to rusting and seizing, which will eventually punch a hole into your wiper motor when you close the window, making your rear wiper floppy or damaging the motor. And if you then try to replace the wiper arm mechanism because you can't un-stick the plunger, there's a solid chance you'll shatter the window trying to get the corroded wiper arm mechanism unstuck from the glass.
I understand the cost savings compared to the previous mechanism in the GX460, but I think this design seems kinda un-Land-Cruiser-like and feels very "consumer-grade". I think spraying that plunger is literally the first thing I did when I brought the car home because I had such a bad experience trying to fix it on my e91 wagon.