This bug is fixed in the releases/2.1 branch and is now available in the 2.1.1-beta release available here.
WOW! Thanks for making the fix available. Hope Ext continues with this. I dont think keeping users from bug fixes increases support subscriptions, it only alienates your users. My plan is to buy a support subscription when I need to be able to develop fast because my product is live - not when I am first learning the API and would like a working prototype.