This problem is being faced by users who have got upgraded to version 2.17.428, although latest stable version in Play Store is 2.17.427. Many are unaware how they got upgraded to 428, maybe a glitch or something as 428 seems to be beta and not stable.
This problem is being faced by people on MIUI8 too. Havent seen anyone using another brand (other than Mi) reporting this problem yet.
Immediate solution is to uninstall and reinstall. The reinstall will be version 2.17.427.