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I'm binding the HeaderText on a StackedColumn to a total that gets calculated during background loading from a database. When that happens the binding does not work correctly.

I have isolated the problem in a sample application at 

https://github.com/StefanCuypers/SfDataGridStackHeaderBindingIssue

If you run this program the grid should show the totals of the columns in the top row.

If you click on the 'Refresh' button this simulates an asynchronous update and you'll see that the 2nd column shows the total for the 3rd column and the 3rd column total shows as 0. Which is not correct.

If you click on the 'Refresh No Delay' button the totals are correct. That button runs synchronously.