Cull Distance Volume doesn't seem to work

I’m trying to use Cull Distance Volume to create a limited visible distance on my map.
It works (sort of) with static meshes I added to the level, for example, the following two images shows by moving the camera, the brownish wood object got culled.


Here is the setting I use:

image

As you can see, to make sure it covers all objects, I made the volume very large.

However, it doesn’t seem to work at all with procedurally generated actors, such as all the silverish objects in the above screenshots.

The give us a sense how large and far the nearby objects are, here I ran the simulation:

image

To have an extreme case, I made the Size a very large number, I assume it will make anything in the map a candidate to be culled:
image

However, it seems nothing is culled now:

Near view:


Far view:

The silverish objects are actors spawned in runtime, where each actor has components generated as Spline Mesh Component. I checked the Allow Cull Distance:

I wonder if there are other variables or settings I’m not aware of need to be set to make it work. Any idea can be helpful. Thanks!

Unreal version: 4.25-plus