Seems my mistake, i thought that exactly pattern unlock was broken, English is not my native language, misunderstood that.
Wiping data on the way. Anyway, thanks for reply.
Mi4C. As saids in warning, i'm change locksreen from pattern to pin, set code, install update, and now this code doesn't work. Already it's 30 minutes block. How to fix that? Clean install must fix that, but it bad way.
Then why install instruction says "Unlock bootloader after installing ROM". Or it's instruction exactly for China, not for this EU? I'm so confused right now. Don't want to use locked device even without twrp.