What is the exact behavior that you observe? Generally, pressing the Ctrl+F would make the Search Panel visible in case it is hidden. If the panel is already visible - pressing the combination would move the focus to the TextBox so that you can start your search. Is this the behavior you observe? Otherwise, are you handling some key events at your end that might be overriding the logic?
I have attached a sample for your reference. You can try to modify it in order to represent the behavior at your end.
Have a great rest of the week.
Telerik by Progress
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