Thank you for reporting this bug. We will make it our priority to review this report.
Jash, thank you for your post & there's no doubt we sense your frustration.
Certainly we understand that a framework like ExtJS will be used in complex, high-profile deployments - and as we start to enter the beta process, I am confident that you will see the quality of the framework converge upon that expectation.
In the meantime, thank you for your patience, and in raising particular issues. If you have any further questions or feedback, don't hesitate to let us know.