pfr stat does not include 3bets?

After 3betting at a table a lot I noticed in the hud stats that my 3b% > pfr%. Is this a bug or intended behavior? It seems to be that pfr should include 3bets.
https://staging.pokertracker.com/forums/
https://staging.pokertracker.com/forums/viewtopic.php?f=16&t=5121
Your 3Bet % is based off opportunities to 3Bet, not overall hands like PFR is.