Excel VBA getting selected pivot items from a pivot field

I have the following code that attempts to loop through the selections on a pivot table field and returns a string with the selected items.   It works as long as only 1 item is selected but if the multiple item flag is set and two or more selections are made, all the items return visible = false.  Is there another property or do I need to do something with the page orientation?

Here is the code:
Function PTfilters(fldName As String) As String


Dim PT As Excel.PivotTable
Set PT = ThisWorkbook.Sheets("MySheet").PivotTables("myPivotTable")

Dim piFilter As PivotItem
Dim iFilterCount As Integer

   iFilterCount = 0
   
   For Each piFilter In PT.PivotFields(fldName).PivotItems
         If piFilter.Visible Then
         iFilterCount = iFilterCount + 1
         PTfilters = PTfilters & "," & piFilter.Name
        End If
   Next piFilter
   PTfilters = Mid$(PTfilters, 2)

End Function