The second box should not have attached backing store. (GraphicsLayer (anchor 0.00 0.00) (bounds 785.00 2024.00) (backingStoreAttached 1) (children 1 (GraphicsLayer (bounds 785.00 2024.00) (contentsOpaque 1) (backingStoreAttached 1) (children 2 (GraphicsLayer (position 20.00 20.00) (bounds 100.00 100.00) (contentsOpaque 1) (drawsContent 1) (backingStoreAttached 1) ) (GraphicsLayer (position 20.00 1500.00) (bounds 100.00 100.00) (contentsOpaque 1) (drawsContent 1) (backingStoreAttached 0) ) ) ) ) ) visible boxhidden box