ID 139090 - RotoPaint displays incorrectly when painting from outside the bounding box with Overscan active on the Viewer

Problem summary
RotoPaint displays incorrectly when painting from outside the bounding box with Overscan active on the Viewer.

Customer reported version
nuke.11.3v5

Customer reported platform
ubuntu

Steps to reproduce

1) In Nuke, create a Checkerboard with a RotoPaint node.

2) In the Viewer press S on the keyboard to view the settings in the Properties bin.

3) Enable Overscan for the Viewer.

4) Select the RotoPaint node and begin painting from the outside of the checkerboard to the inside.

Expected behavior
The Paint should appear without artifacting in the Viewer.

Actual behavior
The painting appears incorrect when applied to the RotoPaint node while Overscan is enabled on the Viewer.

Workaround
Disabling Overscan no longer exhibits this behavior.

Reproduced by Support in

Nuke 12.0v3 - Windows 10, CentOS 7, macOS 10.13

Nuke 12.0v1 - Windows 10

Nuke 11.3v5 - Windows 10

Nuke 11.3v1 - Windows 10

Nuke 11.2v1 - Windows 10

Nuke 11.1v1 - Windows 10

Nuke 11.0v1 - Windows 10

Nuke 10.5v1 - Windows 10

Nuke 10.0v1 - Windows 10

Nuke  9.0v1 - Windows 10

Nuke  8.0v1 - Windows 10, CentOS 7, macOS 10.13​

Earliest version tested
Nuke 8.0v1 - This issue appears to be in all versions of the product