Reduced magnitude of self ignite not working when on weapon set passives

If you try to hit 100% reduced magnitude of ignites on you with self immolation / flamewalker notables, you still take damage if they are allocated using weapon set specific passives (on weapon set 1, the one im using) - I immediately take ignite damage.

I'm immune to ignite if i allocate the same passives with normal passive points.

Not sure if this affects other notables.