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Data Grid Clears List After When Using Column Chooser and Cancelling "Select All" Action

I am using the Blazor DataGrid control in a Blazor Server App with a List<ExpandoObject> as my data source. When I enable the column chooser, I encounter an issue where the list of data in the grid will be cleared. 

The issue can be reproduced in the attached project. There is also a reproduction video attached.

Steps to reproduce:

  • Run the project
  • Wait for data to load
  • Select the Column Chooser dropdown
  • Click The "Select All" checkmark (to unselect all columns)
  • Click the Cancel button
  • Notice the data disappear from the grid.


This seems to happen only the first time you load the grid/page.