Missing ICONs for ALV toolbar menuitems (btn-type 2)

Hello,

i have added a custom menu button (button type 2) to an ALV toolbar using the following code.

action-handler-method: "on_toolbar FOR EVENT toolbar OF cl_gui_alv_grid"

    DATA: ls_toolbar TYPE stb_button.

    CLEAR ls_toolbar.
    MOVE 'TEST' TO ls_toolbar-function.
    MOVE icon_change_order TO ls_toolbar-icon.
    MOVE 'moep'(110) TO: ls_toolbar-quickinfo,
                                                  ls_toolbar-text.
    MOVE 2 TO ls_toolbar-butn_type.
    MOVE space TO ls_toolbar-disabled.
    APPEND ls_toolbar TO e_object->mt_toolbar.

So far, so good, but when i add menu entries to the menu button their ICON is not displayed.

Am i doing something wrong, or is it a known error, that this function is not working?

Because i've never seen an SAP-Standard ALV that had icons for ALV toolbar menu button items.

The Menu Items of the SAP-Standard Menu Button "Layout" for example don't have any icons either.

Here the coding i use to add menuitems.

action-handler-method: "on_menu_button FOR EVENT menu_button OF cl_gui_alv_grid"

  IF e_ucomm = 'TEST.
          CALL METHOD e_object->add_function
            EXPORTING
              fcode = 'TEST2'
              text  = 'meep'(132)
              icon  = icon_mail.

...
  ENDIF.

Now my ALV Toolbar has the new Menu Button with 1 menuitem, that menuitem should be displayed with "ICON_MAIL", but isn't. I also tried using @1S@ and @T_MAIL@.

Would be great if anyone could help me,

thanks.