Question: problems with iOS.
I noticed a strange thing today. the battery shows that I used the browser at night, but I was asleep at the time. details in the photo.
Apps that are in a suspended state aren't actively in use, open, or taking up system resources. With Background App Refresh, suspended apps can check for updates and new content. If you want suspended apps to check for new content, go to Settings > General > Background App Refresh and turn on Background App Refresh.
Switch apps on your iPhone, iPad, or iPod touch - Apple Support