This happens on low amperage USB ports and even happens for me when connected to my old MacPro. But even though it says "not charging" it will still charge (assuming the cable isn't a knock off). Run the iPad down, plug it into the tesla and give it time (takes longer but it charges). I think you'll see it gains charge.
Yes! The important thing--and anyone charging on a compute or laptop with a low power port also runs into this--is that you can't use it
and charge. If you leave it 'off' (i.e., screen dark), it charges...slowly, as you say. If you have the screen on, it won't charge. It's an accurate but confusing/misleading message, but there's little space for Apple to display anything more useful like "not charging at this moment but it will when you turn off the screen." This confused the heck outta folks at my office when we got iPads a few years ago and a couple of people complained they didn't charge off our computers...they did, if folks had the screen off.
(I've charged my iPad in the car, though only a couple of times; I've charged my phone a few times, but also rarely.)
As far as the car: There are a couple of minor things that annoy me slightly, but somehow I can never remember them when asked! ;-) The only one I can remember off-hand is the bug (still not fixed in 5.9!) where the HVAC uses outside air
when set to recycle under certain conditions...grumble. (Conditions are: heat on, location auto or set manually to feet, IIRC.)
- - - Updated - - -
8) B pillar juts out and pokes you getting in or out of the car and leads to excessive wear
16) Rubber seals let moisture in on all the windows in heavy rains or strong spray.. Especially near the triangle windows by the A pillar.
18) no "oh $#it" handles up front
21) windshield wipers are a little strange
Interesting list. #8 annoys me a bit. I haven't run into issues with #16; I'd talk with Service if I were you. #18...my parents want them in my car (and maybe my other half; I forget), but I don't care. #21 - not sure if this is what you mean, but IMHO the auto-wiper software needs adjustment (or the sensors are a bit quirky).