[Bug]: IgcGridToolbarActions - Field name instead of header caption is exported to csv if a column is grouped

[mkamiishi]

Which component(s) are affected?

Other/unknown (please specify in the description)

Description

IgcGrid has a built-in exporting feature. When a grid containing a grouped column is exported to csv, field name instead of header caption is exported.

Reproduction

1. Go to the sample https://codesandbox.io/p/devbox/heuristic-williamson-q56s96?workspaceId=ws_Wca1rSR5QWnYWuPzcJ6uNq
2. Click "EXPORT" button on the top right corner and select "Export to CSV" from the dropdown.
3. Observe the exported csv file.

Workaround

I have not found a workaround.

Is this a regression?

No or unsure. This never worker, or I haven't tried before.

Affected versions

Failing in 6.2.0

Browser/OS/Node environment

Browser:Chrome 141.0.7390.123

[mkamiishi]

This is reproducible with IgxGrid as well > https://github.com/IgniteUI/igniteui-angular/issues/16417