There is an annoying bug with the downloads. Chrome and other apps (such as messenger) cannot download files with the miui download manager. It asks for download then nothing happens (try downloading a .zip from chrome)
su
pm disable com.google.android.gms/com.google.android.gms.droidguard.DroidGuardService
in adb shell or a terminal app to fix youtube.
Does battery history diagram show up for you?
(stable on mi4c)