Bug Predicted spawn classification failing in Editor

I have spent an awful lot of hours trying to figure out why predicted spawns were not properly classified.
It appears the sole reason is that this does not work consistently in the Editor, once compiled there are seemingly no issues.

Attached is a project with a simple setup a spawner that shoots out spheres.
Th sample will predict one sphere but also shoot a purely interpolated version to make it obvious where the client predicted sphere is in relation to the actual sphere on the server.

When run in the editor with the Entities Hierarchy tab active, the prediction classification will fail most of the time, as can be seen in the console.
The reason being that the list of predicted spawns is empty even though it clearly shouldn't be.

If the Entities Hierarchy is deselected, classification completes successfully.
The issue is clearer if the latency is set to something like 40ms.

 

Done, the id is IN-56679