Beta 13.2.0.156 - ADDM problem: ORA-13703 snapshots not found

well thats interesting when I run that query in the PDB that has the drop down it returns the Root and the PDB

|2782172003|2782172003|AZTEST2C|

|1070155216|2782172003|TESTPDB|

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2974455360 2974455360 AZTEST1

so still pretty new to CDB's and PDB's, what does this mean?