I have received an OTA update on Mi8 to upgrade from the 10 Feb 2020 version to the 12 Feb 2020 version.
I have downloaded and installed the update.
After the install, the phone reboots.
At this point the updater says it is still on the 10 Feb update and to install the new 12 Feb version.
I have repeated the exercise and it returns to the same result.
I hope it is of some help to the project.