I feel you. Usually, it's all for the better, but bugs are always found here and there. After all, that's why we're here for - to test the beta and make it better for everyone by providing feedback. It sucks that my Android Auto got broken and sucks even more that there's no mention of a fix in this update, but that's not going to stop me for reporting bugs I find. That's the only way I can thank developers for making such an amazing ROM for all of us.
Speaking of the latest update, dirty flash on Mi 9 (Cepheus) was successful, as usual. No issues detected in the first 15 minutes, but there was something I noticed during the upgrade process:
E:Unhandled flag: 'wrappedkey' <- This message was written in red
Updating partition details...
... done.
Data successfully decrypted