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When using firefox specifically, columns don't get rendered after enabling them in the column chooser if column virtualization is used.
How to reproduce.
https://blazorplayground.syncfusion.com/VDLfDTCCTYQlbnoz
In some situations it's possible for the columns to show up by using the middle mouse button to scroll horizontally and continually scrolling to the right. This only works once a horizontal scrollbar is already visible.