Noticed a few days ago that Tinder had used about 40kb of mobile data out of the blue. The problem is that I have background app refresh disabled, and the app in question wasn't open. Actually, it hasn't been used since I updated to 15.2 several days previously. Has anyone else noticed closed apps using mobile data since updating to iOS 15. Have I misunderstood that an apps need actually be opened to use mobile data, and have background app refresh enabled?