It seems it solved by simply wiping dalvik/art cache and cache.
Thanks.
I would have remained on miui.eu 10/11 too but I haven't found a way to update system apps.
I can't change wallpaper on the stock launcher, it's just a black background. I tried from settings, themes app, launcher settings, no results
Mi9t 12.5.2
Update: solved by reinstalling the miui wallpaper app from Xiaomi ADB/fastboot tools
I'm experiencing terrible battery life, I'd like to revert to MIUI 12 stable, can I just dirty flash the zip file without doing any wipe?
In case even stable MIUI 12 wouldn't solve the battery drain, can I dirty flash MIUI 11 zip?