MP8017 fails the Conformance Test

We designed our own POE circuit according to the MP8017 EVB, but when using the PDA-600 for compatibility testing, the Rdet and Cdet fail items appeared. Any suggestions?

The test results of the two ALT B mode are the same with those of the ALT A MDI-X.

The test results of the two ALT B mode are the same with those of the ALT A MDI-X.

Was there any resolution to this? We are experiencing the same issue!