Initial State is created before final resizeGame() call

FlxGame.create() currently creates the first FlxState before applying actual stage dimensions:

resetGame();
switchState();

stage.addEventListener(Event.RESIZE, onResize);
resizeGame(FlxG.stage.stageWidth, FlxG.stage.stageHeight);

Since switchState() calls _state.create() the first State is inited before resizeGame() updates FlxG.width, FlxG.height, and active scale mode

This is particularly noticeable on mobile, where stage size differs from initial logical resolution

As a result:

• the first State can initialize using old logical resolution
• resizeGame() immediately corrects dimensions afterwards
• subsequent states work correctly because they are created after resize

This makes first State behave differently from every subsequent State.

Suggested fix: apply initial size change before creating the first state

resetGame();

stage.addEventListener(Event.ENTER_FRAME, onEnterFrame);
stage.addEventListener(Event.RESIZE, onResize);

resizeGame(FlxG.stage.stageWidth, FlxG.stage.stageHeight);

switchState();

resizeGame() should also handle fact that _state isn't created yet:

FlxG.resizeGame(width, height);
_state?.onResize(width, height); //if there's no ?. there will be Null Obj Reference

This ensures that first State and all subsequent States are created with same already-calculated game dimensions
Issue is therefore initialization-order problem rather than State-specific or rendering problem

If you need specific examples I can provide them

Start at FlxGame.create(), tracing the current resetGame(), switchState(), and resizeGame() order. Check how resizeGame() behaves before _state exists and verify that the first State receives the final dimensions and scale mode, while subsequent State initialization remains unchanged.