"Ember app not opening on iPhone 11 but receiving notifications: I try to open Ember and the app just sits. I see the logo and wait 30 seconds and it still just shows background color and E. I get notifications"
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App Stalled:
A. Start Here: If an App on your iPhone or iPad Stops Responding, Closes Unexpectedly, or won’t Open - Apple Support
B. Reopen this App (on its own):
Save what need be, and then close all apps. Swipe your thumb up from the bottom-left corner of your screen, and then select responding apps, saving what need me. Once saved, perform this once more, swiping up each app. Then, open this app on its own.
C. Clear the Caches:
Caches are created for remembrance of application use, so that Apps open quicker, and as remembered. So, clear them. Use my User Tip: How to Clear "System Data" in your iPhone's Storage: - User Tip