My ingress app is getting black screen While playing, with and without (5/4G) WiFi. This makes playing impossible!
playing: iPhone 12
space available: 40GB
The game is very memory intensive. This type of glitch happens on when the system is low on memory, not storage. You should quit Ingress, close background tasks, and then launch Ingress again. You can close other applications by swiping up on them when they are in the foreground.
Another item which may help is disabling background updates for particularly network chatty applications while you are playing Ingress. For instance Facebook, Instagram and other social media applications. You are playing ingress...that's the opposite of social.