The bug is related to calling multiple times the 'Create' action on Clicking 'Delete' button and could be reproduce with a Kendo sample:
I have updated the sample.
Steps to reproduce:
- The grid is configured to Virtual mode and add Groups.
- Expand a group
- Do NOT fetch all items in group, that's very Important!
- Click 'Delete' button
Result: I have debugged kendo code and found out that for each ''unfetched' row from the group, grid will take it as a 'new object' and will call 'Create' action for them.
'Create' actions are not called in case the group is fetched to the end and so all items are loaded!