Contour - Does not execute properly

Contour complete fails, only partially contours objects, or works properly depending on the location of the first point and direction of the second point used for the “Direction perpendicular to the contour plane”.
File with line, simple curve and simple solid:
ContourFailV8.3dm (2.8 MB)
Open the file.
Front viewport
Contour
Select the objects
First point - select origin
Second point - above the origin on the Cplane y axis (World z axis)
Distance between contours is 0.5
Result is:

V7 appears to work correctly.

Rhino 8 SR0 2022-2-8 (Rhino WIP, 8.0.22039.16305, Git hash:master @ 87849b22f579aaae10cec6e276a54584f9910630)
License type: Commercial, build 2022-02-08
License details: Cloud Zoo
Expires on: 2022-03-25

Windows 10.0.19044 SR0.0 or greater (Physical RAM: 64Gb)

Computer platform: DESKTOP

Standard graphics configuration.
Primary display and OpenGL: NVIDIA GeForce RTX 2080 Ti (NVidia) Memory: 11GB, Driver date: 12-29-2021 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 511.09
> Accelerated graphics device with 4 adapter port(s)
- Windows Main Display attached to adapter port #0

OpenGL Settings
Safe mode: Off
Use accelerated hardware modes: On
Redraw scene when viewports are exposed: On
Graphics level being used: OpenGL 4.6 (primary GPU’s maximum)

Anti-alias mode: 4x
Mip Map Filtering: Linear
Anisotropic Filtering Mode: High

Vendor Name: NVIDIA Corporation
Render version: 4.6
Shading Language: 4.60 NVIDIA
Driver Date: 12-29-2021
Driver Version: 30.0.15.1109
Maximum Texture size: 32768 x 32768
Z-Buffer depth: 24 bits
Maximum Viewport size: 32768 x 32768
Total Video Memory: 11 GB

Rhino plugins that do not ship with Rhino
C:\Program Files\Orca3D V2\Orca3D.rhp “Orca3D” 2.0.22.0

Rhino plugins that ship with Rhino
C:\Program Files\Rhino 8 WIP\Plug-ins\Commands.rhp “Commands” 8.0.22039.16305
C:\Program Files\Rhino 8 WIP\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 8 WIP\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 8.0.22039.16305
C:\Program Files\Rhino 8 WIP\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 8.0.22039.16305
C:\Program Files\Rhino 8 WIP\Plug-ins\rdk_ui.rhp “Renderer Development Kit UI”
C:\Program Files\Rhino 8 WIP\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 8 WIP\Plug-ins\MeshCommands.rhp “MeshCommands” 8.0.22039.16305
C:\Program Files\Rhino 8 WIP\Plug-ins\Connections.rhp “Connections”
C:\Program Files\Rhino 8 WIP\Plug-ins\RhinoCycles.rhp “RhinoCycles” 8.0.22039.16305
C:\Program Files\Rhino 8 WIP\Plug-ins\RhinoCode\RhinoRoslyn.rhp “RhinoRoslyn” 8.0.22039.16305
C:\Program Files\Rhino 8 WIP\Plug-ins\RhinoCode\RhinoCodePlugin.rhp “RhinoCodePlugin” 8.0.22039.16305
C:\Program Files\Rhino 8 WIP\Plug-ins\RhinoCode\RhinoCPython.rhp “RhinoCPython” 8.0.22039.16305
C:\Program Files\Rhino 8 WIP\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 8.0.22039.16305
C:\Program Files\Rhino 8 WIP\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Rhino 8 WIP\Plug-ins\Displacement.rhp “Displacement”
C:\Program Files\Rhino 8 WIP\Plug-ins\ConnectionsUI.rhp “ConnectionsUI” 8.0.22039.16305

I change the title with the hope this will get some attention. I have not seen similar behavior in previous versions so something change in V8 WIP.

Hi David,
You can run TestToggleContourV8 command for the time being to get back to the V7 contour behavior. We’re using contour as a prototype for some new multi-threaded work in V8 and what you are seeing is in our bugtracking system at
https://mcneel.myjetbrains.com/youtrack/issue/RH-67157

RH-67157 is fixed in the latest WIP