iPhone Screen Time showing website 24/7 use
About a week ago I visited a website that, from subsequent googling, seems legit. However, when I checked my Screen Time for the past week this morning, I noticed that this website has been active 24/7 since the day that I visited it. I don't have the tab open in the browser and don't have the browser open.
How can I identify how this website has been 'active' on my phone all day every day, and remove its access? I'm worried that it's done something nefarious to my device.
iPhone 11, iOS 15