Thank you for your interest in Telerik Test Studio. i would be glad to assist you on that issue but I will need some further details on that topic.
Please first of all let us clarify if you are using Test Studio standalone version, the VS plugin or the testing framework only.
Since you are recording your steps I assume you are using the standalone version. In this scenario I would like to ask whether you have tried to check the 'SimulateRealTyping' option (refer to the screenshot)? Is there any difference in the execution?
Would it possible to provide us your application and the script that fails?
Please gather both the application
and execution logs
and provide them via this thread to continue the investigation.
Thank you in advance for the cooperation. I hope to hear from you soon.