If you own the Mi A1, there is a chance you have received a new update. Although Xiaomi only says the update brings June’s security patch, it also updates the device to Android 8.1 Oreo and comes with some serious bugs.
The update which weighs in at about 1.15GB is wiping SMS history for several users. It is reported to happen when you swipe away the messages app in the recent apps menu. It is advised that you back up your messages. The update is also said to cause SafetyNet, a Google security API to know if your device is in a known-good state, to fail.
Apart from these issues, everything else seems fine. The Android 8.1 Oreo update brings features like battery indicator for connected Bluetooth devices, an adaptive SystemUI theme that changes based on your wallpaper (dark wallpapers give black quick settings menu and bright wallpapers give a white quick settings menu), and new emojis to name a few. The update is also said to improve the audio quality of the device.