I've been a huge Huawei fan since Huawei Mate 8. Would you please tell me why do I have this problem. Just to let you know, I already met this problem with my Honor 9. I sold the phone because of that. Now that I got the P20 Pro, the problem is remaining. To resolve it, I asked to the store to exchange it. Even with a new one, I still have this problem. It doesn't even disappear when changing phones. The video shows an unsolved bug. If there is no other solution, I will have to switch to Samsung or Apple.