Notifications for Peephole camera

I no longer get notifications from my Ring Peephole camera. It used to work fine but over the last few weeks notifications have stopped.I have rebooted the modem the Mesh system and the android mobile, removed and reinstalled the app, I rebooted the doorbell but still nothing, The wifi signal is fine all the rssi is good and in the green. I do receive notifications on the Echo dot for movement. What else can i try apart from a replacement door cam. All other apps on the phone work perfectly and the signal is good and all notifications are turned ON.