Cell value "_x0041_" rendered as "A"

[sandraros]

Code to reproduce:

DATA: gc_save_file_name TYPE string VALUE 'bug_rendering_value__x0041_.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(
      ip_column = 1
      ip_row    = 1
      ip_value  = |_x0041_| ).
  lcl_output=>output( cl_excel = lo_excel ).

Actual result:

Expected result:

Technical note:
When _x...._ where each dot is an hexadecimal digit 0-9 a-f A-F, is stored in sharedStrings.xml file, it's a special text interpreted by Excel as being the corresponding Unicode character U+.....
The text _x0041_ should be stored as _x005f_x0041_ in the sharedStrings.xml file so that to be rendered _x0041_, _x005f_ being the character _ (first underscore).