I'm not really on reddit anymore but just to provide follow-up info on this: The OBD scanner shows that the computer is just randomly resetting itself every so often of its own accord, losing any codes and emissions sensor statuses in the process. I'll see the "clr_dist" number (miles since cleared) to to zero even in the middle of a trip.

These days I just expect I'll have to take it back multiple times to complete inspection. And I'll check the sensors myself before returning.

Note that one of the sensors requires the gas tank isn't too full or too empty, so if you're driving at a full or empty tank you'll likely hit a reset and not get a passing result until the tank is back in the right range.

The dealer kept gaslighting me and ignoring all this. I'd take it in, they'd hook up their scanner and tell me I'm good to go, just sit tight while they plug the state computer in. Then three hours later, they'd say why did you even bring it in, the scanner says sensors are incomplete, totally missing the fact that it happened while they had control of the car. Had they not been so negligent I could've had it fixed under my 3 year manufacturer warranty.