Eventhub event metadata is None

I followed the example code in Eventhub triggerred Azure function in python. However, I got None for event enqueue time, offset, and etc.

import logging
import azure.functions as func

def main(event: func.EventHubEvent):
    logging.info('Function triggered to process a message: ', event.get_body())
    logging.info('  EnqueuedTimeUtc =', event.enqueued_time)
    logging.info('  SequenceNumber =', event.sequence_number)
    logging.info('  Offset =', event.offset)

EnqueuedTimeUtc, SequenceNumber, Offset are all None. event.getbody() return the right payload I sent to evetnhub. Do I need to modify the payload I sent to eventhub to get the EnqueuedTimeUtc and other metadata?

[damnedOperator]

Have the same problem mentioned by @richardleeaus

[richardleeaus]

This still appears to be an issue? Nothing within the passed in object func.EventHubEvent has SystemProperties? Like above, no EnqueuedTime available