bug 14.0.4.0

Last night I was charging my phone, while it was shut down (I often shut it down to charge) and it was on 88% when I decided to take it off. When I turned it on the battery dropped to 83%. I tried rebooting it but nothing happened. Is it the battery or just some bug?

After Updating MIUI 14.0.4.0 my Redmi note 10 pro front camera is not working, back camera is working fine but when I switch to front camera it's totally blank. another problem i facing right now my phone has no sound. kindly anyone tell me that this problem comes for MIUI latest update.