Enable World Partition settings not working

If you want to enable World Partition for a map, it would seem like you could open the World Settings and check the box saying Enable World Partition, however that won't work

Even if you go into Project Settings and select Enable World Partition

after going back to the map you will need to restart the editor and in some cases I've seen create another map, go to that, then RE-open the original map and finally you'll see Enable World Parition is now recognized by the engine.