Currently it is not possible to check most modified SAP standard objects when the ATC check is called via RFC.

The cause is this logic within method INFORM of ZCL_AOC_SUPER:

        SELECT SINGLE cnam FROM reposrc INTO lv_cnam
          WHERE progname = p_sub_obj_name AND r3state = 'A'.
        IF sy-subrc = 0
            AND ( lv_cnam = 'SAP'
            OR lv_cnam = 'SAP*'
            OR lv_cnam = 'DDIC' ).
          RETURN.
        ENDIF.

In an RFC context, any information contained in table REPOSRC is irrelevant to this check.

Unfortunately, I don't have a good idea on how to solve this yet.