Actually, I have (for this - different - touchscreen issue) - but only after calling the support hotline.
After my call I almost directly (i.e. a few hours later) I got the instructions on how to request a repair. The repair request was approved within less than two days (from which at least half the time they had to wait for feedback from me). I need to turn in the phone to the repair center, it will be picked up tomorrow (sniff…).
I absolutely encourage you to call support via phone in case of hardware issues, they were very friendly and helpful (in my case and what I heard from others).
Regards,
Bernd