ID 561341 - Setting Project3DShader's project_on knob to "back" is not respected by the ScanlineRender2 node

Problem summary:
Setting Project3DShader's project_on knob to "back" is not respected by the ScanlineRender2 node

Customer reported version:
Nuke 14.1v2

Customer reported platform:

N/A

Steps to reproduce:
1) Launch Nuke and create a GeoCard in the Node Graph
2) Create a Project3DShader node, and change its project on knob to "back":

3) Add a CheckerBoard node, and connect it to the Project3DShader's texture input.
4) Create a Camera node, and connect it to the Project3DShader's camera input.
5) Position the Camera so the Projection is applied to the Card.
6) Render the GeoCard with a ScanlineRender2 node, and observe how the Projection is visible on both sides of the Card, when it should only show on the back side:

Expected behavior:
Projections should only appear on side of the object specified by the Project3DShader's project_on knob.

Actual behavior:
When a Project3DShader node's project_on knob has been set to "back", the Projection will be visible on both sides of the geometry when viewed through a ScanlineRender2 node. 

Workaround:
No known workaround at this time

Reproduced by Support in:
Nuke 15.0v2 - Windows 10, macOS 13 Ventura
Nuke 15.0v1 - Windows 10
Nuke 14.1v2 - Windows 10
Nuke 14.1v1 - Windows 10 - Regression
 

Unable to reproduce bug in:
Nuke 14.0v6 - Windows 10

Earliest version tested:
Nuke 14.0v6 - This issue doesn't appear in this version and has regressed