[flexcoders] updateDisplayList fires only when increasing a browser size?

[Danko Kozar]

I've made a custom component (based on Canvas). When resizing a 
browser, the "updateDisplayList(unscaledWidth, unscaledHeight)" fires 
only when resizing to a greater window size. When resizing to a smaller 
size, it doesn't fire. The scrollbar appears instead. Why?

Thanks!!