Battery drains when phone is ideal. before i go to sleep i charged my phone to 71 %.  in the moring after about 10 hours battery was 46%. this never happened before. Also this new update making this phone slow and hangs sometimes. MiUI feels slower than before. navigation buttons keeps reappearing or stays there in some apps. camera quality is reduced.
some network issue is also there make me turn off the internet and turn on again to reuse internet after long ideal time.