I can confirm that once I uninstalled the RING app from my iPad, rebooted it, reinstalled the app, and then turn OFF the option under Device Settings > Alert Settings > Notifications Preferences > In-App Notifications (again, turn this OFF), I am now getting full-screen views when activity/motion occurs. That setting applies to all of my cameras, too.
It’s a shame that RING has so, so, so many complaints about the same recurring issues here and refuses to actually fix them. I can’t think of another app that requires an uninstall/reboot/reinstall on my iPad or my Android devices. At the very least, if they’re going to require these steps, say so in the app updates note.