BACK Button ends Transaction, but should go back to selection screen

I want to use an ALV grid with a selection screen but without adding additional dynpros and PAI PBO Modules, like shown in this Example.

Everything works fine, but I can't go back from ALV to selection screen since the report gets terminated.

For my understanding, I need to adapt this part of code. If I don't call the function RS_SET_SELSCREEN_STATUS, I can go back to selection screen, but the F8 button is showing during the ALV Screen.

* Drucktastenleiste: Button "Ausführen (F8)" entfernen
    DATA: it_exclude_btn TYPE STANDARD TABLE OF rsexfcode WITH DEFAULT KEY.
    it_exclude_btn = VALUE #( ( fcode = 'ONLI' ) ).
 
    CALL FUNCTION 'RS_SET_SELSCREEN_STATUS'
      EXPORTING
        p_status  = '%_00' " akt. Standard-PF-Status des Dypro 2000
      TABLES
        p_exclude = it_exclude_btn.
 
* leere SAP-Toolbar ausblenden
    cl_abap_list_layout=>suppress_toolbar( ).
 
* Focus auf ALV setzen
    cl_gui_alv_grid=>set_focus( control = o_alv ).
 
* Flag für Screen-Status auf ALV-Anzeige setzen
    gv_screen_status = 'IN_ALV'.
  ENDIF.

Please help me to make the Back Button work in ALV view.

EDIT: You can test the behaviour using the code below:

PARAMETERS dummy1.
SELECTION-SCREEN BEGIN OF SCREEN 2000.
  PARAMETERS dummy2.
SELECTION-SCREEN END OF SCREEN 2000.

AT SELECTION-SCREEN OUTPUT.
  IF sy-dynnr = '2000'.
    DATA it_exclude_btn TYPE STANDARD TABLE OF rsexfcode WITH DEFAULT KEY.
    CALL FUNCTION 'RS_SET_SELSCREEN_STATUS'
      EXPORTING
        p_status  = '%_00' " wrong one: back will leave program
      TABLES
        p_exclude = it_exclude_btn.
  ENDIF.

START-OF-SELECTION.
  CALL SELECTION-SCREEN 2000.
  ASSERT 1 = 1. " Debug helper to set a break-point / never reached

To achieve the desired behavior, add the AT ... ON EXIT-COMMAND event.

You can insert the following code almost anywhere, for example place it before AT SELECTION-SCREEN OUTPUT.:

...
AT SELECTION-SCREEN ON EXIT-COMMAND.
  CASE sy-dynnr.
    WHEN '1000'.
      LEAVE PROGRAM.
    WHEN '2000'.
      LEAVE TO SCREEN 0.
  ENDCASE.
...