Question Mousing over the game while it's paused seems to make it "update"

I am working on some debug visuals. That involved calling Graphics.RenderMesh in LateUpdate to visualize a hitbox.

I'm using Unity 2022.2.9 with the HDRP.

I noticed that the mesh would randomly disappear after a little while. Notably, in the game view:

1. I pause the game
2. I advance the game by one frame
3. The mesh appears
4. I mouse over the game view
5. The mesh disappears and motion blur visibly updates

Does interacting with the game view during a pause make something...happen? Does it cause the rendering pipeline to get executed again? Can I do anything to make sure that the mesh drawn by RenderMesh doesn't vanish?

I also noticed that clicking while the game is paused makes the graphics jitter a tiny bit, like something is refreshing on every interaction.

 

Perhaps its as simple as the difference between Time.deltaTime and Time.unscaledTime;