Arlo baby motion/sound notifications not sending
Have you tried to remove & reinstall the Arlo mobile app? What version of the Arlo app are you using? the latest version is 2.7.10. Also, what firmware version is the Arlo baby using & what OS is your iphone running?
To check the OS version on your iphones with the issue, go to Settings >General > About > (Software version).
To check the firmware on your Arlo baby, go to Settings > My Devices > Select Arlo Baby cam > Device Info.