Ortho cam with Skylight casts a Shadow

Unreal 5.3. When I use an Ortho camera with a Skylight and there’s any shadows in the scene, the ortho camera casts a very distinct square shadow. If I move the camera to the other side of the wall that’s causing the shadow, the shadow disappears - it actually turns white. If I turn off the SkyLight, the shadow disappears.

The camera mesh is hidden in game, the spring arm Probe size is 0, its Do Collision Test is unchecked. There’s no primitive meshes or components in the ortho cam setup, so there’s no Set Hidden Shadows to turn off. There’s no collider on the camera. I’ve spent time turning off every Cast Shadow, unchecked visibility on every part of the ortho camera setup, deleted almost the entire scene except for the camera and the skylight, shadows still there.

I think this may be a bug with Lumen AO and the Skylight. Am hoping there’s a way to fix this.