Battery drained completely during the night

So my iPhone battery was completely drained when I was asleep, it had like a good 40% battery when I set it down but in the morning it didn’t turn on. When I got it to charging and back on I went to look at the screen time and it showed that the camera app had been on for some time during the night, but when I looked at the battery usage it only shows the screen being on for one minute through the whole night. I’m very confused over this, because my phone isn’t that near me when I sleep so it couldn’t have been me and I also have the auto-lock on so it should have turned off after some time. 🫠🫠

Here’s the screen time showing the camera being on: