Collision Hits Moving Characters Only- Issue

The collision of the “projectile”* hits moving actors only.
It has every collision channel set to “block”
Yet it doesn’t hit the terain or actors that are standing still.
I want to avoid generating overlap events, because it affects performance.
the green Cylinders are indicators of event Hit occuring .

video: - YouTube

*The projectile is really just an actor moved on a timeline between point A and B, it is more performant than a standard projectile, which also had this problem.