Ciao, @stephenw10
I did some test as suggested.
With pfblocker enabled worked well for 2 days, then it begun to had some random crashes.
These crashes usually happens during video stream (netflix) or watching youtube.
Also, the router crashes even after pressing the "save" button to disable the plugin. But I have no issue when I do the same procedure but to enable it.. very strange.
Unfortunately I haven't any log of these situations, usually on the home screen I have a yellow bar with a link, but now after the router reboot, it is like nothing happened.
Now I removed pfblocker and eneble the traffic shaper again and I will do some new test with this settings