ID 472719 - The Viewer becomes corrupt or multiplied when tabbing between 3D and 2D with a 3D object and Roto nodes upstream in the Hydra Viewer.

Problem summary
The Viewer becomes corrupt or multiplied when tabbing between 3D and 2D with a 3D object and Roto nodes upstream in the Hydra Viewer.

Customer reported version
nuke.13.0v1

Customer reported platform
windows10

Steps to reproduce

1) In Nuke, create a Checkerboard node.

2) Add a Roto with any shape, and set the premultiply knob to rgba.

3) Create any 3D object downstream (Sphere, Cube, etc.)

4) View the 3D object.

5) View the Roto node.

Expected behavior
The completed render should appear in the Viewer without corruption or artifacts.

Actual behavior
Artifacts or corruption can occur when viewing 3D nodes with a Roto node upstream.

Workaround
Enabling "use GPU for viewer when possible" in the Viewer properties, or setting the Viewer > 3D > renderer to Nuke works as expected.

Reproduced by Support in:
Nuke 13.0v1 - Windows 10, CentOS 7

Unable to reproduce bug in:
Nuke 12.2v6 - Windows 10, CentOS 7

Earliest version tested
Nuke 12.2v6 - The Hydra Viewer feature did not exist before this version