Nav Area class is reset after updating from 4.19.2 to 4.20 Preview 3

When upgrading a 4.19.2 project to 4.20 Preview 3 the Nav Area Class is changed to None instead of the value it was before the upgrade. Upgrading from 4.18.3 to 4.19.2 works as expected.

This was tested in 4.20 Preview 3 (CL-4135216) and Main 4.21 (CL-4151283)

1. Create a Blueprint project using the Empty template in 4.19.2
2. Add a Nav Mesh Bounds Volume to the default Level
3. Create a Blueprint based off an Actor and add a Collision Box to it
4. Select the Collision Box and check 'Dynamic Obstacle' under Details>Navigation
5. Make sure the Area Class is set to NavArea_Obstacle
6. Save the Project
7. Open a copy of the project in the 4.20 Preview 3

Results: Nav Area Class is reset to "None" from "NavArea_Obstacle" after project update to 4.20 Preview 3.

Expected: Nav Area Class is still NavArea_Obstacle after update.

How does TextureRenderTarget2D get TArray<uint8> type data?

Do I need to call Destory method to remove components from Actor when Destory method to remove Actor?

How to delete some elements correctly when deleting an array loop?

How do I set a material as a post-processing material?

Why does the REMOVE method of map container remove elements have memory leaks?

Where can I download the source address of the deployment cotum service associated with the PixelStream plugin?

What is the cause of the packaging error falling back to 'GameUserSettings' in ue5?

UMG RichText not appear image when packaged

How does TArray loop correctly remove elements in blueprints?

What is the difference between Camera and CineCamera?