Hi sam Aryan,
In Q3, we did some major changes in the UI related code. We have also changed the old default style, added VSM, DelegateCommands, etc. If you are upgrading from an earlier version to Q3, we recommend that you take a look at the new default style. If you still have an issue with this, it would be great if you could send us your custom style so that we can look into it.
All the best,
the Telerik team
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