@kmrinpa, before I forget: in our 2017 Santa Fe, the transmission does a hard shift for the first 1-2 shift. Every time I turn it on, the engine shifts perfectly fine until I turn it off and back on again. The dealership couldn't figure it out. I did three drains and fills with AMSOIL SS ATF, ran it for 6000 miles, and did the same again with Red Line D6 ATF. It's been 1000 miles since then, and no change. I also reset the adaptive values for the transmission twice (once for the AMSOIL, once for the Red Line). No change. Now the dealership wants several hundred dollars to do some deeper diagnostics. I'm more inclined to change out the entire valve body and computer myself before giving them a single penny, knowing how incompetent they are.
I had some other issues with this one as well, but I don't want to get into that.
Would I buy another one of these? Never.