Why reset the traffic counters in 6.2 after disabling a policy?

We upgraded to 6.2.10 after being on 6.0.13.  Previously you could disable and re-enable a policy without it clearing the traffic counters but now it clears the counters, bytes, first used, last used dates on a policy - why has this been changed?

Is this the same in later firmwares?

This was useful information and you may just be disabling a policy temporarily but now you lose the information if the policy has ever had traffic on the fortigate without searching logs and you logs may not be able to go back far enough in the logs.  Especially if you are considering deleting a policy it is good to know if it was last used 3 months/6months/1 year ago etc.  You could manually clear them right clicking and clearing counters if you wanted to.  Why is fortigate resetting this information now?  This was really good for providing information on the policy usage without looking at the logs.