Reports are that Xiaomi has fixed the bugs that affected last weekend's Android 10 upgrade for the Mi A3. However, the company also warns that rolling back to Android 9.0 Pie from Android 10 can cause system instabilities, which is not all that reassuring.
https://www.notebookcheck.net/The-Xiaomi-Mi-A3-starts-receiving-a-fixed-version-of-Android-10-amid-warnings-of-rolling-back-to-Android-9-0-Pie-causing-errors-and-defects.455832.0.html