The LayoutChangeStarted and LayoutChangeEnded events are obsoleted and that's why they are not fired. Instead (in most cases) you can use the PreviewTilesStateChanged, PreviewTilePositionChanged, TilesStateChanged and TilePositionChanged events. Also there's a feature request for new more accurate animation events in our PITS here
If you tell us what exactly is your case we'll help you find the right events for it.
We are looking forward to hearing from you.
the Telerik team
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