The MB monitor properties file defines the following minimum performance metrics
# CPU Time,Elapsed Time,CPU Time Maximum,Elapsed Time Maximum ,
# CPU Time Average, Elapsed Time Average
We are not seeing CPU Time and Elapsed Time but are getting the other 4 listed above
The Elapsed Time CPU Time etc are reported by the agent in seconds (not milliseconds) and so if the value is less that 0.5s it will be rounded to zero and zero values will not be sent by the agent hence will appear not to be monitored.
An idea has been created for this behaviour to be improved