Rage Generation - Trauma support and Vengeance node

Don't know if anybody else is going through something similar or if I'm just not understand something correctly, but in my set up I should be gaining 12 rage per melee hit every 0,5 seconds, but since I started using Kaom's Primacy I'm just gaining 3 per melee hit. For information, I have:

1 rage on hit from the small node from the Vengeance wheel

3 rage on hit from the Veteran's Wrath wheel

2 rage on hit from the small node from the Battle trance wheel

1 rage on hit from Slaughter

5 rage on hit from Kaom's Primacy

After some testing I respected Vengeance and it started working again(gaining 12 rage per hit), which makes me thing that the problem is the game is prioritizing the rage generated for 'being attacked' by trauma before generating the rage from the hit itself. I'd hope to at least gain 12 rage on hit even in this scenario, best case would be if both stacked and I received 15 rage on the hit, being the attack itself and the 'being attacked' happening at the some moment/from the same source