I tried to reproduce the described behavior but to no avail - everything is working as expected on our side. Could you please modify the following example in rder to reproduce the issue and send it back to us?
I tried to reproduce the error in Dojo and I implemented sample app almost same as my application. But it works fine in Dojo sample. Only error I could reproduce in Dojo is when the event is drag & drop and re sizing it moves but console shows following error.
Uncaught TypeError: g.duration is not a function
But in my real application with above error following error shows same as when it removes events