ID 370107 - Render Only Selected Objects renders selected objects and objects with common ancestor location

Problem summary
Render Only Selected Objects does not render only selected objects, but rather still renders objects that live outside of whichever ancestor location is common to selected objects.

Additionally, the ancestor location does not exceed 3 deep and the camera is never pruned.

For example:

1) If the common location is /root/world/geo, then only the unselected objects in /root/world/geo are pruned.
2) If the common location is /root/world, then only the unselected objects in /root/world are pruned (besides the camera).
3) If the common location is /root/world/assets/geo, then only the unselected objects in /root/world/assets are pruned. Notice the prune happens only down to the third level.

Case 1:

Case 2:                                                                            Case 3:

Customer reported version
katana.3.0v4

Customer reported platform
centos7

Steps to reproduce

Create the following Katana scene or download the renderOnlySelectedObjects.katana project.

1) Create four primitive creates. Cube, sphere, cone, taco. Place the cone and taco in /root/world/fx (RWF), leave other two in /root/world/geo (RWG).
2) Create Camera and merge all together.
3) Position all four pieces of geo and frame camera.
4) Create a couple of lights
5) Turn on "render selected objects only"

Now observe the following.

6) If I select one of the objects under root/world/geo, the other one is not rendered, but the selected object is rendered along with everything under /root/world/fx.
7) If I select one of the items under root/world/fx, again the other one is not rendered, but the selected object is rendered along with everything under /root/world/geo.
8) If I select one or more objects under both /root/world/geo and /root/world/fx, the selected objects are rendered but no lights (check the alpha in the Monitor to see what is rendered).
9) If I select one or more objects under /root/world/geo and /root/world/fx as well as a light, only the selected object(s) and the light are rendered.

Workaround

No known workaround.

Reproduced by support

This bug has been reproduced in:

Katana 3.0v5 - Windows 10, CentOs 7
Katana 3.0v1 - Windows 10, CentOs 7
Katana 2.6v4 - Windows 10, CentOs 7
Katana 2.6v1 - Windows 10, CentOs 7
Katana 2.5v7 - Windows 10, CentOs 7
Katana 2.5v1 - Windows 10, CentOs 7
Katana 2.1v6 - CentOs 7
Katana 2.1v1 - CentOs 7
Katana 2.0v5 - CentOs 7
Katana 2.0v1 - CentOs 7
Katana 1.6v3 - CentOs 7

Earliest version tested
- This issue appears to be in all versions of the product

Expected behaviour
Selected Objects renders only selected objects.

Actual behaviour
Selected Objects renders selected objects and objects that live outside of whichever ancestor location is common to selected objects.