I had problems with the battery and the 6.2.22 version, in a Mi Note 3. Yesterday I went back to the 6.2.18, two days testing the 22 version, and I recovered the same situation as before the change.
With the 6.2.22 a 10% of the battery last 2h, and with the 6.2.18 last more than 3h. I was...