No live view on cellular network

Hi all, we have been using our Ring Video Doorbell3 for well over a year now without issue. All of a sudden we are not able to do a “Live View” over the cellular network. Whilst in the house and on the same WIFI network all is good. We still receive doorbell notifications as per usual. When we attempt a live view it times out yet we can go back and watch what was recorded during the attempted live view. All our other Ring Devices allow cellular live view. We have, deleted the camera and re-installed Deleted and re-installed the app Changed from Chime Pro network to home WIFI network. “Live View” setting is ticked. Reset the Doorbell. I’ve just tested live view on a third iPhone and that does work on the cellular network. Both my iPhones though are having the same issue. Any assistance would be greatly appreciated. Thanks guys. Con