RestAPI displaying throughput data in wrong formatting (possible packets) instead of bps or Mbps

Can you capture the exact response from the BIG-IP to see if it contains the expected values, but in the malformatted way that is discussed in that article you linked? 

This issue does not seem to be fixed in any version yet. However, you should be able to work around it if you can apply some manipulation to the raw JSON BEFORE it's read by your parsing library.