When I checked the actual device on a device that was upgraded to iOS12.4.2, the screen remained dark.
There are no changes to the app, and xcode has not been upgraded.
We have also confirmed that it works properly with previous OS versions.
Since the warning dialog when using the terminal function when starting the application is displayed, it does not seem to be hung.
Is this possible by changing the xcode settings?
macOS High Sierra
Version 10.13.6
Xcode
Version 10.1