Brushs not using world partition Loading Range

Hello,

I found that any brush in my world doesn’t use my world partition “loading range”.

Example:
I am close enough, the walls are streamed

I went backwards, the walls are not streamed anymore because they are not in range

As you can see the brush is always loaded, it does this for any brush I place.
And “Is Spatially Loaded” is true

Any ideas of why this happen ?