Rendered View Materials suddenly "bleach out" randomly


Lately I have been experiencing a sudden glitch in the Rendered Viewport. Even when the system is sitting there idle, the rendered viewport materials will suddenly turn white-ish, and shadows disappear, as if somehow the brightness was turned up to 11. Below is my system info. Any insight would be appreciated. Thank you kindly.

Rhino 6 SR20 2019-11-18 (Rhino 6, 6.20.19322.20361, Git hash:master @ f60ce76e397bba419469ae5277fc1578641caa3a)
License type: Commercial, build 2019-11-18
License details: Cloud Zoo. In use by: Brian Jackson ()

Windows 10.0 SR0.0 or greater (Physical RAM: 32Gb)
Machine name: AMI-REMOTE3

Non-hybrid graphics.
Primary display and OpenGL: NVIDIA GeForce GTX 1070 (NVidia) Memory: 8GB, Driver date: 4-17-2019 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 430.39

OpenGL Settings
Safe mode: Off
Use accelerated hardware modes: On
Redraw scene when viewports are exposed: On

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

Vendor Name: NVIDIA Corporation
Render version: 4.6
Shading Language: 4.60 NVIDIA
Driver Date: 4-17-2019
Driver Version:
Maximum Texture size: 32768 x 32768
Z-Buffer depth: 24 bits
Maximum Viewport size: 32768 x 32768
Total Video Memory: 8 GB

Rhino plugins
C:\Program Files\Rhino 6\Plug-ins\Commands.rhp “Commands” 6.20.19322.20361
C:\Program Files\Rhino 6\Plug-ins\WebBrowser.rhp “WebBrowser”
C:\Program Files\Rhino 6\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 6\Plug-ins\RhinoBonusTools.rhp “Rhino Bonus Tools”
C:\Program Files\Rhino 6\Plug-ins\RhinoRender.rhp “Rhino Render”
C:\Program Files\Rhino 6\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 6.20.19322.20361
C:\Program Files\Rhino 6\Plug-ins\rdk_ui.rhp “Renderer Development Kit UI”
C:\Program Files\Rhino 6\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 6\Plug-ins\RhinoCycles.rhp “RhinoCycles” 6.20.19322.20361
C:\Program Files\Rhino 6\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 6.20.19322.20361
C:\Program Files\Rhino 6\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Rhino 6\Plug-ins\Displacement.rhp “Displacement”
C:\Program Files\Rhino 6\Plug-ins\Calc.rhp “Calc”
C:\Users\brianj\AppData\Roaming\McNeel\Rhinoceros\6.0\Plug-ins\SectionTools (fbdb1d7f-8cfb-42c1-9858-87cb6315932c)\2019.2.19.478\SectionTools.rhp “SectionTools”

How many monitors are you running and at what resolution?
Does this happen in all Rhino files or just this one?
What other applications are your running when this happens?

There is a newer service release of Rhino, and there are newer drivers for your GeForce card.
I’m not sure either of these are at fault here, but I would update both before I gave up on it.