iPhone owners, beware. It appears Facebook might be actively using your camera without your knowledge while you’re scrolling your feed.
The issue has come to light after a user going by the name Joshua Maddux took to Twitter to report the unusual behavior, which occurs in the Facebook app for iOS. In footage he shared, you can see his camera actively working in the background as he scrolls through his feed.
The problem becomes evident due to a bug that shows the camera feed in a tiny sliver on the left side of your screen, when you open a photo in the app and swipe down. TNW has since been able to independently reproduce the issue.
more here