ID 389707 - The alpha channel displays corruption or artifacting when passed through a DeepMerge(holdout) node.

Problem summary:
The alpha channel displays corruption or artifacting when passed through a DeepMerge(holdout) node.

Customer reported version:
nuke.11.3v3

Customer reported platform:
centos6

Steps to reproduce:

1) In Nuke, create two DeepRead nodes with different alpha channels available.

2) Create a DeepMerge node and connect the two DeepRead nodes.

3) Open the Properties bin of the DeepMerge node and select the operation for holdout. 

4) View the DeepMerge(holdout) node.

5) Move the mouse cursor over the Viewer and press A on the keyboard for results.

Expected behavior:
The alpha channel should maintain the correct values and not appear distorted or corrupt.

Actual behavior:
The alpha channels being passed through the DeepMerge(holdout) appear with corruption or artifacting.

Workaround:
There is no workaround available at this time.

Reproduced by Support:

Nuke 11.3v3 - Windows 10, CentOS 7, macOS 10.13.6

Nuke 11.3v1 - Windows 10

Nuke 11.2v5 - Windows 10

Nuke 11.2v1 - Windows 10, CentOS 7, macOS 10.13.6 - regression

Unable to reproduce bug in:
Nuke 11.1v6 - Windows 10, CentOS 7, macOS 10.13.6

Earliest version tested:
Nuke 11.1v6 - This issue no longer appears in this version and has regressed