I solved that by using gameWidth and gameHeight parameters:
addChild(new FlxGame(/gameWidth:/ 1820, /gameHeight:/ 1024, PlayState, ...));
in the Main.new() function
I solved that by using gameWidth and gameHeight parameters:
addChild(new FlxGame(/gameWidth:/ 1820, /gameHeight:/ 1024, PlayState, ...));
in the Main.new() function