Let's clarify how the NavigateTo method works. If you are using it in the Test Studio as a non coded step Test Studio will wait until the browser is ready. It contains WaitUntilReady Method.
However if you convert the step to code or write it manually then Test Studio will not wait until browser is ready. The NavigateTo coded step should contains only one row of code.
Let me know if this helps.Kind regards,
the Telerik team