farcus:
looking at this article
https://www.xda-developers.com/xiaomi-finally-rolls-out-stable-android-pie-for-the-mi-box-s-with-tons-of-bug-fixes/
Android TV 9 build 2604 appears to be the first version 9 stable release for Mi Box S (released April 2020), so if you're having issues with your box then it is probably worth getting the latest update
So all Android 9 builds before this were beta then. Users should not have been on Android 9 unless they were OK to test these builds, and accept some issues. From other posts I have seen there have been people complaining and saying that the device is rubbish etc while they are on a 9.0 beta releases. These people need to be educated on how software release life cycles work. Personally I would not have gone to Android 9 unless it was a stable release.