Battery issue after iOS 17.3
I just bought my phone iPhone 14, it's been a week since I bought it, but when I updated 17.2.1, there was no problem, now after the 17.3 update that comes, when I turn the phone completely off and on, my charge drops or rises, also my battery health is 100 and I talked to Apple support, they said no problem on the phone, what should I do to me?
iPhone 14, iOS 17