Insane Safari battery drain after updating to iOS 16.1.2

Hello,

after updating to iOS 16.1.2 my iPhone 13 Pro runs out of battery in less than 4 hours.

The iPhone gets hot immediately after I start using it and it remains hot for a while even when idling. To be more precise, it gets really hot in the area of the A15 processor. I assume there's some sort of background task running and consuming power uselessly. After a while of being idle, the temperature goes back to normal and battery usage with the screen shut down seems to be normal. But when I use it, the battery drops tremendously fast.

As you can see from the picture here, the main culprit seems to be Safari somehow. The thing is I barely used Safari today and I don't even have any pages open. As you can also see, I only managed to get 3 hours and 11 minutes of "Screen-On" time today, which is terrible.

What I tried:

- Deleting those apps that I knew were aggressive on battery. I assumed there might had been an update on one of those apps that caused battery drain (even though the Battery Health manager showed very low battery usage on all the apps). Didn't work.

- Disabled contacts syncing as someone reported battery improvements after doing so. Didn't work

- Tried enabling Low Power Mode when I had 80% battery left but didn't matter, it still ran out of battery within 4 hours and a half.

Any tips?