My iPhone XS Max randomly started having focusing issues. The view in the camera app will pulse from focused to not focused very quickly and it will not stop even if I try to force focus by touching the screen. When I select 2X focus it seems to stop. I've tried force closing the app and restarting my phone numerous times to no avail. I've removed the case and cleaned the lens. I'm also on the latest version of iOS. Any idea why this is happening or how to fix it?