I'll recommend you to stay in beta until new stable version is released. Then I'll do a clean install of stable. I don't think updater is going to install stable versions if you are in beta.
I've seen your logo, I like cubing too. Trying to get faster in 3x3 at the moment.
I installed the alpha launcher and want to return back to the xiaomi.eu one. I tried dirty flashing the rom, clear system an reflash the rom without success.
I'm on latest beta, does the latest beta have the alpha launcher?
Thanks in advance.
Reboot into recovery, volume + and power together for a few seconds. Then connect to a PC. If this doesn't work use fastboot. I use a usb memory for clean installs, you can use it in TWRP
Edit: It seems you have installed the ROM, forget this comment if it worked.
Don't know what to tell you, after a clean install of xiaomi eu everything worked fine until I flashed magisk stable v20.3 and the problem happened again. The only solution for me was flashing pixel experience as I've written before.
I don't know how this happened but here is how I solved it.
I wanted to know what was the problem so I tried a clean install with another rom (Pixel experience), flashed the ROM and magisk before booting and everything was ok (clean flash), then format data and clean install latest xiaomi eu...
This morning I updated to latest canary magisk with the app and the phone took about 15 minutes to boot, then the screen was washed, very pale color and nothing worked, tried settings, apps, etc everything caused bootloop.
Flashed ROM and magisk again and happened the same. Unistalled magisk...
In the past I used titanium backup, but when I change for a different ROM I prefer a full clean install. Save the copy in the PC or USB and give it a try.
With TWRP you should do a full backup of your device, it is recommended in case you have to restore a partition.
It's not difficult, there...
I had the same problem with a wrong TWRP, are you using the official one?
About your other question:
MIUI: It's an OS based in Android, It's xiaomi official software for its devices (except the xiaomi A serie)
Xiaomi.eu: It's a ROM, a modification of...
Same here, tried everything, and there are other users too. The problem is that when the screen is off the phone kils the process. I know it because it works with the screen ailways on without problems.
I use a workaround with and app called back screen that keeps the screen awake but in black...