I found a bug on my Xiaomi MI 6X, Ukrainian language - on call|dialing screen with T9 search of contacts stored with Cyrillic letters. This is not a problem of this release it was also in previous one or even in earlier releases, I just didn't have a time to investigate it and thought that it can be fixed with some settings. The problem is that Cyrillic letters which are included in the search algorithm are different with what is written on call|dialing screen and different with English...
T9 contacts searh problem in ukrainian language on dialing screen
T9 contacts searh problem in ukrainian language on dialing screen