Xiaomi has resume their update on Android One devices, the company told that after pulled the original update they get lots of issues from Mi A1 users. The new update with build number is OPR1.170623.026.8.1.10 fixed all bugs that were discovered after the first roll-out. In the first roll-out users faced ncluded Bluetooth battery draining issues, random reboots, and unresponsive dialler app, as reported on Mi Community and XDA forums. The report also points out that the company has brought back the fingerprint gestures while removing the SIM HD notification.
if you are already upgraded to Oreo, then this new update will be worth 89 MB but if you are still on Android Nougat then you will have to download 1112.4 MB to upgraded your A1 to the latest software version.