Why are the World Partition cells streaming so randomly here?

Started a new blank project in 5.2 and this is just using individual cubes for a test, but i get the same results with my own static meshes, level instances, etc.

Nothing is parented, attached or referenced. That setup is just using the default settings from a new “open world level”

I have tried bigger and smaller cell & load sizes. Also tried a variety cube sizes too.

I feel like i am missing one of those magical unreal engine check boxes that makes everything work.

Looks like this is a somewhat known bug since 5.0 :confused: