Screen time acting strange

Hello, immediately after installing ios 18 my screen time suddenly changed to 16 hours average even though the accurate screen time was 1-2 hours a week. What’s strange is that the screen time bars that show you when the phone was being used showed the highest usage time during 12:00am to 6:00am which is when I am asleep and my phone is shut down. I don’t understand why it is showing that. I have tried closing background app refresh and even resetting my screen time but i don’t know why my phone is showing 10+ hours used at night. It also changed my previous screen times of the past weeks as well so my screen time of last week was 1 hr 50 min but after ios 18 is transformed to 16 hours. I am not sure what i can do to fix this.