Description
Using Windows Rive app Beta 0.8.1928 and flutter rive 0.13.14. I load the .riv file using:
RiveAnimation.direct(
imported_file.riv
artboard: "artboard",
onInit: (Artboard artboard) {
_logger.info(artboard.defaultStateMachine); // null
_logger.info(artboard.defaultStateMachineId); // 0
}
);
Even though the default (any only) statemachine for this artboard is checked as default in the UI.

I can easily load this state machine using
StateMachineController.fromArtboard(artboard, "Default");
Device & Versions (please complete the following information)
Flutter 3.24.3 • channel stable • https://github.com/flutter/flutter.git
Framework • revision 2663184aa7 (3 weeks ago) • 2024-09-11 16:27:48 -0500
Engine • revision 36335019a8
Tools • Dart 3.5.3 • DevTools 2.37.3