Notification not going to device any more

I have a wired stick up cam. I used to receive notifications on my devices, but one device only receives notification intermittently and the other not at all. I have added a WiFi extender in case the issue was poor signal but it not helping. Note: the camera is detecting motion and recording it, but it is not giving me notifications on one device and only intermittent notification on the other. I DO have motion and notification enabled in both ring app and phone app, so this is not the problem.