I'm still not able to reproduce a Tab key failure. The best and the fastest way for us to troubleshoot the issue would be if you provide the necessary steps and a public website to reproduce this behavior. If you consider this information to be sensitive for a public forum. Please go ahead and open a support ticket. Unlike a forum thread support ticket is completely confidential.
Also note that as part of best practices, we typically recommend not including Tab key presses. Since Test Studio acts directly upon the DOM, recording a step to press Tab to move to the next field or to open drop-down is unnecessary.
Hope to hear from you soon!
the Telerik team
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Public Issue Tracking
system and vote to affect the priority of the items