Today my indoor wired Ring camera decided to not stop notifying when in Disarmed mode. I changed between the modes, and turned motion detection and live view off/on but it keeps the settings the same.
Those were the best steps to take. Changing your Modes settings should have helped for it to function as set and desired. Try also checking for any Geofencing or Motion Scheduling settings, as well as Device Linking or toggles for your Camera.
Please also ensure there is not a VPN enabled on your mobile device. I hope this helps! 