Bug Report

When the Grid is exported with child columns hidden with Multi-column headers, the columns headers are not exported.

Reproducible

1. Go to this Progress Kendo UI Dojo
2. Export the Grid

Current Behavior

The column headers do not all export:

Expected Behavior

The Grid should export all column headers like when they are not hidden - Dojo :

Workaround

Explicitly set the parent column's exportable configuration to true - Dojo:

$("#grid").kendoGrid({
    columns: [
        { field: "name", title: "Name" },
        {
            title: "Address",
            exportable: true,  //set to true 
            columns: [
                { field: "street", title: "Street", hidden:true, exportable: true },
                { field: "city", title: "City", hidden:true, exportable: true }
            ]
        },
        { field: "phone", title: "Phone" }
    ]
    //....
});

Environment

Kendo UI version: 2026.2.520
jQuery version: 4.0.0
Browser: all