When will huawei fix volume control interface not disappearing?

[Android Central Question]

It has been quite awhile since Huawei mate 20 pro came out. I just got my brand new phone last month and notice that the volume slider bar does not disappear unless I go into a random app and rotate screen which is pretty annoying. I already restarted my phone and the problem just go away for like 10 mins and it happens again. The problem also affects to other users since last year and seen like they aren't fixing it with update.