ID 595433 - Project3DShader randomly rendering incorrectly in ScanlineRender

Problem summary
Project3DShader randomly rendering incorrectly in ScanlineRender

Customer reported version
nuke.16.0v4

Steps to reproduce

1. Launch Nuke
2. Open the attached script
3. Press Play

Expected behaviour
The projection should stay the same across all frames

Actual behaviour
Some of the rendered frames will have an incorrect projection. You'll see it jump around in the viewer while rendering or when scrubbing back. The pictures show two consecutive frames, 3D viewer on left, SLR on right. The two frames only have a very small difference in camera position, so you can't see much difference in the 3D views, but there is s a big difference in the SLR output (it sort-of jumps to the right on the second frame). This becomes much more obvious when you scrub as random frames will have different projections.

Workaround
Use the classic 3D system

Reproduced by support
This bug has been reproduced in:
Nuek 16.0v4 - Windows 11

Also reproduced by the Nuke development team