After 2 years in the Taycan I still miss the soft close doors I had on my previous Panamera - not so much that I'd get after-market ones fitted, though 🤔.
Interesting observation... I've got a 23 GTS with the original heater and not had problems - though I did have some misting up during the colder mornings early this year. As you said: didn't think anything about it at the time.
Sounds to me like the ACC is getting confused by the truck - I'm guessing there was little in the way of bodywork low down where the sensor would normally detect a car.
I have a MY23 GTS ST on 21" Mission-Es and I don't consider the ride harsh - quite comfortable, in fact, especially in Normal. If you want harsh try an M4 🤣.
I've lost LTE connection for a couple of days now - but also I see Bluetooth is missing (won't connect to a known mobile and doesn't present an option to connect a new one) and the GPS/nav is WAY off - it's got me driving through fields maybe a mile from where I actually am 🤔.