Created Unassigned: Cannot remove OutlineLevel [9238]

I have a grouping (outline) in the original sheet being loaded and try to remove that grouping, but the grouping remains.

This works fine when the OutLine is added programatically and then removed programatically (via ungroup()).


var wb = new XLWorkbook("C:/Temp/OutlineInput.xlsx");
var ws = wb.Worksheets.First();
var outlinedRows = new List<IXLRow>();
ws.RowsUsed().ForEach(r => {
if (r.OutlineLevel > 0)
{
r.Ungroup(true);
outlinedRows.Add(r);
}
});

When changing XLWorkbook_Save.cs to always save the OutlineLevel to the native row object it seems to work.

// if (thisRow.OutlineLevel > 0)
row.OutlineLevel = (byte)thisRow.OutlineLevel;