Yeah they apparently ran some scans on the transmission and everything checked out.
The 2nd time I drove straight back to the dealership since I was nearby and they scanned again without shutting the car off and still showed no issue. All I know is it'd act like it was in neutral for about 2 minutes. Then it'd barely creep forward even at 4000 rpm. Going to park and back to drive didn't help. Restarting the car didn't help. After about 10 minutes of slowly getting better, it'd be back to normal.
That's also been my experience on multiple systems. But one thing that's seemingly inevitable for me with Arch, things will eventually become flaky and I cannot solve it without a reinstall.
For instance, when I first got my RX 9070XT on a 3 year old arch install, it worked great. Then Cyberpunk would crash the graphics driver, but only during the benchmark or moving around. 3 months later there was no change. Bought a new PSU cuz I was running one 100w under spec (PowerSpec 650w bronze... bought a Corsair RM1000x) and nope.
I eventually got fed up and decided to go the immutable route. Works great again.