ID 424374 - Alpha channels are stuck at '0' with Image nodes

Problem summary
Alpha channels are stuck at '0' with Image nodes.

• Reading a jpg with the ImageRead node sets the alpha channel to '0' rather than '1'.
• ImageColor node with the default color settings (1,1,1,1) has a '0' alpha channel.
• Setting the alpha channel to '1' with the ImageChannels node does not set the alpha to '1'.

Customer reported version
katana.3.2v4

Customer reported platform
rhel7

Steps to reproduce
1) Read a .jpg with the ImageRead node or create an ImageColor node.

2) Preview render on the ImageRead or ImageColor node

3) In the Monitor tab, view the alpha channel.
Note: the alpha channel is '0'

4) Connect an ImageChannel node and set the alpha to '1'

5) In the Monitor tab, view the alpha channel.
Note: the alpha channel is '0'

Expected behavior
The monitor should show white.

Actual behavior
The monitor shows a black image.

Workaround
No known workaround.

Reproduced by support
Katana 3.5v2 - CentOS 7 - Affected
Katana 3.5v1 - CentOS 7 - Affected
Katana 3.2v4 - CentOS 7 - Affected
Katana 3.2v1 - CentOS 7 - Affected
Katana 3.1v7 - CentOS 7 - Affected
Katana 3.1v3 - CentOS 7 - Affected

Katana 3.1v2 - CentOS 7 - Not affected
Katana 3.1v1 - CentOS 7 - Not affected
Katana 3.0v1 - CentOS 7 - Not affected
Katana 2.5v1 - CentOS 7 - Not affected
Katana 2.0v1 - CentOS 7 - Not affected
Katana 1.6v3 - CentOS 7 - Not affected