@alphabetsoup,

Odd, Did your phone happen to update that night?

An app reinstall should fix any behaviors like this, especially if you can confirm the camera is online.

I would recommend trying to connect to your camera through your cellular carrier. The method your phone uses to connect to the camera changes depending on whether or not it is connected to the same wi-fi as your camera. It may be that your phone is having difficulty communicating locally due to some network or privacy setting.