iOS Flutter with Firebase : white screen and SIGABRT in FlutterAppDelegate on launch

Question

In more than one project now, and very inconsistently, I get a white screen upon launching my app, and Xcode showing an error, Thread 1: signal SIGABRT, on the

Answer 1

OK - so - while putting the question together I (1) tried the app on the iPad device and it crashed, (2) tried the app on some simulators and it worked, then (3) retried the app on my iPad and it worked.

So a solution that works to fix this issue sometimes is to, from within Xcode :

Run the app on a simulator, then re-run it on your device