I was not able to reproduce this behaviour with the official mobile demos. Does the problem persists there?
The issue might be connected with the way mobile application components are initialized or the amount of data that is being loaded. Actually there is a help article
where you will find suggestions how to speed up the view transitions.
If those guidelines does not help, it would be best to open a support ticket with a runnable test project attached. Thus way we would be able to observe the problem, track down the cause and advice you more accurately.
the Telerik team
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