What else i did:
I have flashed with tool:
Mi Flash 2017.4.25.0
Firmware Version:
Xiaomi_Mi_Mix_2S_V9.5.15.0.ODGCNFA_20180425_8.0_China
-> clean all and lock
______
I also flashed the MIUI10 fastboot pack
polaris_global_images_8.6.14_20180614.0000.00_8.0_global
/ extracted tgz
-> clean all...