@Igor Eisberg
Hi.
There's a problem i'm suffering with volume buttons from some time ago on a Redmi Note 5 with latestMIUI 10.4 beta, Android 9.
My settings are configured this way: Volume buttons control (by default) ringtone volume, not multimedia volume.
But despite of that, volume buttons control multimedia sound ONLY in Music or Videos app (or Gallery videos). When i play music/videos in other apps, including native Browser, volume buttons control ringtone volume.
I also have a Redmi 5 with the latest 10.3 stable (Android 8.1) and it's working properly: whenever music play, no matter if the app is in the background, no matter which app is playing the sound, volume buttons can control the multimedia volume. In fact, i don't remember suffering this problem on the Redmi 5. My wife is also getting this problem on a Redmi Note 4X with latest beta from January (Android 7.0).
Correct behaviour is the one from the Redmi 5, according my choice in settings:
By default volume buttons control ringtone volume, but when a sound is playing from elsewhere, volume buttons should control multimedia volume.
Is it a known problem for China ROM, or a problem of mine?
Also, since some versions ago, i can't set 2 different notifications for the SMS on both SIMs. This setting was relocated to SMS app notifications, instead general sound settings, but i can't find if there's a way to set 2 different alerts.
Thanks a lot for your work.