Xiaomi MI A1 today gets a new security update that is meant to improve security & bug issues. The update is just 153MB.
This new update has improve the lag issue & also have improved the stability issues. The security update has also improved the camera performance in which I have noticed that the auto focus and the image quality of the smartphone has improved as compared to its earlier performance.
At the same time, the new update comes with a small bug too. When you scroll through the notification, you will find a slight flickering while swiping down in quick notification.
This update seems to an improvement adding to the device before getting the Android Oreo.This is obviously the last update before the Android Oreo.