My 2019 Genesis G70 just did
My 2019 Genesis G70 just did the same thing. It only has 4k miles, and sits inside heated garage. I came out and there was crack from bottom driver's left to 1/3 of the way across windshield. Hadn't been driven for over a week, and crack wasn't there the day before. No impact, and garage had neither been hot or cold. It is nice, but frustrating, to see these reports of the same thing happening to them.