Redmi Note 8 has some strange behaviors on Android 11. Battery drain, works slow, not optimized at all. Status bar and visual effects are also a problem.
Not to mention the encryption problem with TWRP. We can only hope that MIUI 12.5 will correct all these shortcomings.
Although I don't hope too much because newer updates actually make the situation worse. Especially with Xiaomi when it comes to Android upgrades always make a mess. I don't know why that is but i use Xiaomi since 2014 always the same story.
I realized that I should stay on that stable version where everything works properly, and ignore the updates.
For all those interested in a stable release for this phone it's MIUI 12.02.2 by xiaomi.eu based on android 10.
Direct link:
Everything here works as you expect!
To clarify this explanation of mine has nothing to do with xiaomi.eu they always made extraordinary ROMs!
Many thanks to xiaomi.eu for providing us the best systems for Xiaomi phones for years! A hundred times better than any official rom!