How to make Water Body Ocean show in HLODs

I have built a large level but the water body ocean is not showing up in the HLODs. The properties both have ‘Show in HLODs’ checked so I’m not sure why this is happening.

You can see in play mode that there is no HLOD built for the part of the ocean that connects to the land.

Here is the water body settings and how it should be drawn in in the editor.