compare_faces compares only the first face in array

• face_recognition version: 1.2.2
• Python version: Both 2.7.5 and 3.6.5
• Operating System: CentOS 7

Hello,
This code below doesn't work for me for multiple known faces. It only compares first face in the array.

face_encodings = numpy.array(list(my_face_encodings.values()))
...
...
results = face_recognition.compare_faces(face_encodings, unknown_face_encoding)

unless i do this. use a for loop. code below works but why not the one above?

face_encodings = numpy.array(list(my_face_encodings.values()))
...
...
for kface in face_encodings:
    results = face_recognition.compare_faces([kface], unknown_face_encoding)

what might be wrong that compare_faces does not accept my array?

No repository file or test is named. Start at the compare_faces entry point and reproduce the report using the supplied array and loop examples, then inspect how multiple known face encodings are handled. Done means the behavior for the array input is understood and the reported case has appropriate test coverage or a documented explanation.