Having the World Partition editor open slashes our frame rate

Without the world partition editor open, most of the world partition runs at 50 to 60 fps. The instant you open that editor, that drops to 4 fps, and it stays like that until you close the world partition editor. The video below shows this.

We have Lumen active. This has been an issue on 3 different computers, though we’ve only checked with this project.

Should I report this as a bug?

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