Actors on an axis and in multiple cells are not culling

Actors on an axis and in multiple cells are not culling as expected.

1. Create or open any project
2. Create a new Blank World Partition level (ensure World Partition Streaming)
3. Place a Cube(A) at (0,0,0), another(B) at (25,000, 0, 0), and one more(C) at (25000, -20000, 0)
4. Scale the cubes uniformly by 100
5. Play in Editor
6. Fly away from the cubes while watching them until Cube C cull

Expected Results:
Cubes further away than Cube C would also cull, and ultimately all 3 will cull.

Actual Results:
Only Cube C culls, and the rest will never cube.

World Partition Cells not unloading properly

Is Unreal's World Partition Broken?