ID 465803 - Nuke can't write Apple ProRes files with values above 1

Problem summary
Nuke can't write Apple Prores files with values above 1.

Customer reported version
nuke.n/a

Customer reported platform

Steps to reproduce

1) In Nuke, create a Colorwheel node.

2) Create a Write node and file path as .exr.

3) Set the colorspace as linear, then render a single frame.

4) Read in the rendered frame, and add a Grade node.

5) Increase all knob values to their max.

6) Add a Write node and render a single-frame ProRes4444 .mov.

7) Read in the ProRes4444 .mov and view the info bar for RGBA values while hovering the mouse in the Viewer.

Expected behavior
The ProRes renders should appear with the correct values as rendered.

Actual behavior
The ProRes renders are clipped/maxed with a value of 1.

Workaround
There is no available workaround at this time.

Reproduced by Support in:
Nuke 12.2v4 - Windows 10, CentOS 7,

Nuke 12.2v1 - Windows 10

Nuke 12.1v1 - Windows 10

Nuke 12.0v1 - Windows 10

Nuke 11.0v1 - Windows 10

Nuke 10.0v1 - Windows 10

Nuke 9.0v1 - Windows 10, CentOS 7

Earliest version tested
Nuke 8.0v7 - This issue appears to be in all versions of the product (Rendering ProRes wasn't available until 9.0v1)