Clang error during Cloud Make process for iOS

[MappyIan]

We use the Cloud Make process to create the installation files for our mobile app.  We're trying to create a final build before AppStudio is withdrawn next month but when trying today we received an error with the iOS build (the Android app was built successfully):

The error says:

clang: error: unable to execute command: Segmentation fault: 11 clang: error: clang frontend command failed due to signal (use -v to see invocation) ./../../Project/NetworkingPrivate.h:36:23: warning: 'QNetworkConfiguration' is deprecated [-Wdeprecated-declarations] /Users/appfactory/Qt5.15.6/5.15.6/ios/include/QtNetwork/qnetworkconfiguration.h:62:7: note: 'QNetworkConfiguration' has been explicitly marked deprecated here

This sounds like a problem with AppStudio or the Cloud Make process.  Can anyone from ESRI advise? @ChrisLeSueur @TrevorFrame 

[MappyIan]

For what it's worth, I tried re-building the app (without making any changes whatsoever), and the third time round the Cloud Make process worked without error and the app built fine.  Maybe there was a glitch at Esri's end?  Who knows.