After upgrade Flyme to 6 stable, my Meizu M3 Note have an issue on home button, he don't work when I want to return from any apps, or I want to scan my fingerprint, I don't think he have an hardware problem, because was moments when he works, but rarely, I downgrade to Flyme 5.1.12.0G and I have the same problem, please tell me what is the problem, he is an hardware problem, I don't upgrade correctly to Flyme 6, please tell me, thank you very much, sorry for my bad English!