Starting with the sample in Demo section and change the autoUpload flag to false, dojo here : http://dojo.telerik.com/uXIxo/2
i can reproduce my issues.
Step 1) Add many files
Step 2) Try to remove the first one (with the X icon)
Step 3) See the Console, upload handler is called and JS Exceptions are thrown.
At that point its not working anymore, need a full refresh.
Tested in : IE Edge, Chrome and FireFox.
Does anyone experience the same issues?