Instance Foliage Actor "cannot be saved as it has only been partially loaded" is driving me nuts. What can be done about this?

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This issue only happens in one Level in my project. Using Unreal 5.2.

If I use the foliage tool to place any foliage, it is unable to save.

This issue happened suddenly, I used to be able to save foliage just fine. Nothing has changed in the project since last being able to.

This seems to be caused by World Partition. I have tried unloading and reloading the area with no luck. Anyone else know what to do about this issue? I have scoured the internet and forums and the only consensus on this issue is to completely restart in a new level, which is obviously far from ideal.