The latest version of the Xiaomi customization layer is MIUI 12 , an expected version that brings with it many changes and that was therefore expected to bring with it errors and problems. Regardless of the method we have followed to update to the latest version, we can find a series of failures of which Xiaomi already has evidence to solve them.

We ourselves can also be participants in MIUI 12 developments and we can report bugs and problems to Xiaomi with the intention that they be solved as soon as possible. An update of such caliber can take a while to be polished and achieve with this that we do not find these errors in the customization layer that we are going to know, which for now have been reported in the Xiaomi Mi 9, Xiaomi Mi 9T and My 9T Pro for being one of the first to update.
MIUI 12 main issues
Black background with floating window
When we use the PiP mode the video plays correctly but the rest of the screen cannot be used because it turns into a black background.
Problems with WhatsApp
The messaging application generates errors in the texts of the application and in the notified ones, making it sometimes impossible to read the messages.
Gestures in MIUI 12
In case we use the gestures of the layer we are going to find recurring failures in MIUI 12 that prevent us from changing applications. In some cases it only affects the gesture to go back and in others in Google search.
Status bar icons

When using the new dark mode 2.0 of MIUI 12 we can find that the status bar where the time and notifications appear cannot be seen.
Notifications are not removed
Although we have read a notification, it is maintained and we have to manually remove it with a gesture to one side.
Lock in settings
Within the settings and specifically in storage, an error occurs in Xiaomi that forces the system to close and makes it impossible to use it.
Untranslated texts
Chinese text that has not been translated is found at various points in the system, for example in privacy protection and super wallpapers. There are also problems with translations in the Bluetooth options that appear in English.
Screen flicker
One of the errors that can affect us the most is the whereabouts of the screen after unlocking it, something that in some cases does not disappear until the phone is restarted.
Time format

Although we have chosen the 24-hour format, we still find ourselves with the AM and PM model.
Google Assistant
When using Google Assistant we cannot interact with it manually, although only through voice because the dark mode prevents us from seeing it.
App blocking

When we use multitasking to block applications from closing, we cannot unblock it when all the panel is shown in black.
Errors with floating sale in games
When we are using the game mode, some messaging apps can be used as a floating window and it is impossible to use them due to a failure that does not allow them to be used normally.
Direct access to the calendar
From the MIUI 12 widget we cannot access the calendar directly, the app does not even try to open it.
Notifications open at your whim
In some cases notifications are displayed and in others it is impossible, a MIUI 12 issue that repeats itself randomly.
Failures on Instagram
The popular social network cannot be fully used in MIUI 12 by preventing uploading videos and some posts.
Source>Xiaomi