We have a custom grid, which is a GraphicsLayer. It updates every time the map panning ends or zooming ends. We remove old graphics and add a new collection. It works 5 or 6 times, but then it suddenly freezes inside the addGraphic method and the map freezes as well. It was working in 10.1.1 SDK, but it's freezing in 10.2. Looks almost like a deadlock in nativeAddGraphic method. Do you have any ideas what could be causing it and how to avoid this issue?