Thanks for writing and for the further details.
As my colleague Valentin said, we are in the process of investigating possibilities for optimization here and we hope that we will be able to ship an upgraded version of RadPhoneApplicationFrame
soon that will solve the undesired behavior.
We will keep you posted on this thread when further details are available.
Do not hesitate to get back to us in case you have further questions or need assistance.
the Telerik team
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