Hi everyone, I just wanted to thank the user omeromeryigit. Their solution of disconnecting the touch power button and the volume bar was the definitive one. After searching all over the internet and insisting at the official dealership, the only apparent solution was to replace the screen with a new one. 1500 euros and several weeks with the vehicle out of commission waiting for the new screen to arrive. Thanks to this thread and omeromeryigit's suggestion, I dared to remove the screen and disconnect the touch power button. Amazingly, despite my fears, it was all very easy and quick to do. Now everything works correctly (except for the aforementioned power button - I wasn't using it - and the touch volume bar - I control it from the steering wheel). I saved 1500 euros and everything was solved in just 30 minutes. Go for it!