UMG Renderer path changes on every graph reload

[shamilatesoglu]

From internal R5 test channel:

When the user spawns a UMG render, it gets added as RealityUMGRenderManager0 - 1 - 2.... as shown in the screenshot.

If the user deletes the graph and reloads it, the 0-1 shown in the screenshot becomes 2-3. If they do it again, it becomes 4-5 — so with each graph reload, the UMG path keeps changing. Would it be possible to make this fixed/consistent?

HTR (How To Reproduce):

1. Spawn a UMG Renderer
2. Save the graph
3. Reload the graph