SET_CELL_FORMULA doesn't work for cells not previously initialized

[sandraros]

The following code doesn't show a formula in cell A1:

REPORT.
CONSTANTS: gc_save_file_name TYPE string VALUE 'test.xlsx'.
INCLUDE zdemo_excel_outputopt_incl.
START-OF-SELECTION.
  DATA(lo_excel) = new zcl_excel( ).
  DATA(lo_worksheet) = lo_excel->get_active_worksheet( ).
  lo_worksheet->set_cell_formula( ip_column = 1 ip_row = 1 ip_formula = '"hello"&" "&"world"' ).
  lcl_output=>output( lo_excel ).

Actual result:

Expected result:

[AndreaBorgia-Abo]

@sandraros I'm reviewing the SET_AREA PR and one thing caught my eye in your test report and it's that the workaround for this bug is apparently still needed but ONLY when running against Libreoffice 7.2.2.2 under Linux.

With workaround:

Without workaround:

Excel 2013 behaves as advertised, so I am NOT reopening this.