Hi,
This issue related on the SAP issue related HRTMC_PPOM vs PA30 on qualifications..
It is correct to return 0% match as the Talent does not have a matching competency in HRTMC_PPOM screen or Talent Details Panel if the CP object not have competency.
Please check with the technical consultant related on the method get_competencies for hrtmc_ppom.
Regards
Mohamad