@gertjan yes, it was pfblockerng-devel v3.1.0_6.
I have blocklists set to prevent traffic coming from "non friendly countries", basically, asia region, russia, some northern countries + africa.
But I agree, it is quite weird.
I've now made several tests with pfblocker-ng enabled/disabled, etc.. and always see the BW drop when pfblocker-ng is enabled.
5c64470f-6054-465d-8153-9428ad13ba7a-image.png