Projectile passes through "Accumulate damage DM"

So I have a DM with a damage threshold of 40 and accumulate damage on:

57470-capture.png

I also have the default projectile from the first person shooter project, which I modified to apply 30 damage on hit.
I’ve also changed it’s collision settings to ‘bloack all’
If I shoot one projectile it passes right though as if it does not exist, but I know it passes damage because on the next projectile, it does react as though the bar is there and breaks it.

Any idea as to why this happens?

Impact resistance was too low.