RB3011UiAS FastPath disabled but working

I have new router installation on RB3011UiAS.
FastPath disabled, have firewall rules, and Connection Tracking enabled.
IP Setting also show that FP and FT not enabled, and counters is zero.

But in interface list and interface traffic statistic I see that counters with FP prefix showing some values slightly different from Tx Rx rates.



Why it is not zero?
fastpath.PNG