TPS23861: TPS23861 failed the test when it was certified as SIFOS

Hi  sir, madam,

  Now customers made a POE switch, PSE is choose TPS23861, but now the customer has been to SIFOS certification, have a failure of the project, please help to analyze, what causes SIFOS authentication failure, the attachment is the schematic diagram and SIFOS report. Thanks!TPS23861 schematic diagram.pdfSIFOS REPORT.pptx