Screen Time Help

I cannot figure out what is making my screen time show so high every day. What are all of the grey bars during the times I am asleep? It’s basically saying I’m on my phone from midnight till I wake up constantly, but it just shows as a gray bar. I can’t find any app that is taking up 5-6 hrs, so I have no idea what it is. I would love to use this data, but it seems so skewed I’m having a hard time believing it. Here is a week view and a day view