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Steps to reproduce:
1. var parentSprite:Sprite = new Sprite(); // the bugSprite's parent Sprite;
    var bugSprite:Sprite = new Sprite(); // bug occured on this
    parentSprite.addChild( bugSprite );

    var shape:Shape = new Shape(); // add a child DisplayObject
    bugSprite.addChild( shape );
    shape.graphics.beginFill( 0 ); // draw something to fill the child
    shape.graphics.drawCircle( 100, 100, 20 );
    shape.graphics.endFill();

2. bugSprite.addEventListener( MouseEvent.MOUSE_OVER, handler );
    ...
    function handler( event:MouseEvent ):void
    {
        var pt:Point = new Point( event.stageX, event.stageY ); // when MOUSE_OVER event occur, the point must be over the child
        if( bugSprite.getObjectsUnderPoint( pt ).length ){
            trace( "OK: getObjectsUnderPoint works well" );
        }else{
            trace( "WARNING: getObjectsUnderPoint find nothing" ); // this line should never execute
        }
    }

3. move the mouse to test if getObjectsUnderPoint works -- yes, it works.
    then:

    parentSprite.scaleX = 2;
    parentSprite.scaleY = 2;

    retry, the bug occurs
 
 Actual Results:

 WARNING: getObjectsUnderPoint find nothing
 
 Expected Results:
 
OK: getObjectsUnderPoint works well

 Workaround (if any):
 
 
 

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Steps to reproduce: 1. var parentSprite:Sprite = new Sprite(); // the bugSprite's parent Sprite;     var bugSprite:Sprite = new Sprite(); // bug occured on this     parentSprite.addChild( bugSprite );     var shape:Shape = new Shape(); // add a child DisplayObject     bugSprite.addChild( shape );     shape.graphics.beginFill( 0 ); // draw something to fill the child     shape.graphics.drawCircle( 100, 100, 20 );     shape.graphics.endFill(); 2. bugSprite.addEventListener( MouseEvent.MOUSE_OVER, handler );     ...     function handler( event:MouseEvent ):void     {         var pt:Point = new Point( event.stageX, event.stageY ); // when MOUSE_OVER event occur, the point must be over the child         if( bugSprite.getObjectsUnderPoint( pt ).length ){             trace( "OK: getObjectsUnderPoint works well" );         }else{             trace( "WARNING: getObjectsUnderPoint find nothing" ); // this line should never execute         }     } 3. move the mouse to test if getObjectsUnderPoint works -- yes, it works.     then:     parentSprite.scaleX = 2;     parentSprite.scaleY = 2;     retry, the bug occurs    Actual Results:  WARNING: getObjectsUnderPoint find nothing    Expected Results:   OK: getObjectsUnderPoint works well  Workaround (if any):