My experience thus far is that Warranty doesn't make a difference.
I noticed recently that my car's front rotor has this coating failure issue. I brought it in. The car still has warranty. The dealership escalated to corporate. And corporate just denies the warranty claim, arguing that its from...
Do you have any pictures you can show to provide context?
Even if you set Recuperation to On at the beginning of the journey? Or only when Recuperation is Off (default every time the car turns on)?
What's the proper way to treat that white stuff? I used 10% household vinegar and that did not work. Is it even possible to wipe it off as opposed to sanding it off?