App crashing, cameras disconnecting

I have an iPhone 7 with current iOS. I receive motion notifications, but if I try to view my cameras, the app crashes. I have an older iPhone with an older iOS. I can see the cameras on there, but they lose connection every few moments. This is only an issue when I’m outside my home network. While I’m home, everything functions perfectly. How do I fix this?


edit: The app works fine when my phone is connected to an outside WiFi network. Just not when it’s using its lte data