Streaming level bounds expand bigly when adding SceneCapture2D component in blueprint

Using UE 4.25.1

I have a simple minimap capture blueprint. It’s just a SceneCaptureComponent2D, linked to a render target asset, and set in orthographic mode.

I also use world composition, and the problem I’m seeing is that, when a sub-map contains this component, even if it’s centered on the landscape tile, the bounds for the landscape tile becomes gigantic.

Here are the bounds with the blueprint in the world, in the center of the tile:

Here are the bounds when I remove this blueprint:

I have not explicitly set any bounds on this component or actor, and I’ve even tried reducing the net relevancy distance (which I don’t use, and shouldn’t matter) to 0, and it’s still this big area.

Here’s the setup of the capture component. (Note that the camera itself is rotated down 90 degrees, so it comes into the right orientation when I drop the blueprint in the world. Also note that I cropped it in the middle to remove empty space and make it viewable in the forum)

Why does this blueprint cause the level to get such massive bounds?