Just tested in garage. A cabin with averter only reduced total damage 19%. It needs to be a consistent 30%. Please fix
If there is other dmg reductions in play it can affect the amount the averter reduces. That’s why there’s the little description saying up to 30%. Ermak and Bastion mess with it often but so does upgrading for resistance to all damage on the cab 10%.
There is a hard cap to applied resistance reduction. I don’t remember what it is off the top of my head. It’s somewhere between 30-60%. Anything past the hardcap is lost. This is what is happening to your test, I suspect.
What cabin did you use?