ID 542982 - Cryptomatte selects incorrect values when the Viewer's downrez is not 1:1

Problem summary:
Cryptomatte selects incorrect values when the Viewer's downrez is not 1:1
 
Customer reported version:
Nuke 13.2v5
 
Customer reported platform:
Rocky 8
 
Steps to reproduce:
1) Launch Nuke and create a Read node in the Node Graph.
2) Select some cryptomatte footage to open, such as the sample images available here.
3) Create a Cryptomatte node and press the 1 key to View it.
4) Change your Viewer's downrez knob to anything other than 1:1, such as 1:2

5) In the Cryptomatte node's Properties, activate the eyedropper tool by clicking on the color swatch of the Picker Add knob.
6) With Ctrl/Cmd + Left-click, attempt to pick an object from the Viewer and observe the behavior: 

 
Expected behavior:
Objects directly under the eyedropper tool should be selected (or removed) from the Cryptomatte node, regardless of the Viewer's downrez.
 
Actual behavior:
When the Viewer's downrez is not 1:1, Cryptomatte selections are not accounted for correctly and objects have to be selected based on their "true" 1:1 positions. 
 
Workaround:
The Cryptomatte node seems to behave as expected after cycling the Manifest Source from Metadata to Sidecar, and then back to Metadata.
 
Alternatively, it is also possible work around this issue by using proxy mode instead of downrez: 

 
Reproduced by Support in:
Nuke 14.0v4 - Windows 10, CentOS 7
Nuke 14.0v1 - Windows 10
Nuke 13.2v1 - Windows 10
Nuke 13.1v5 - Windows 10
Nuke 13.1v2 - Windows 10, CentOS 7 - Regression
 
Unable to reproduce bug in:
Nuke 13.1v1 - Windows 10, CentOS 7
 
Earliest version tested
Nuke 13.1v1 - This issue doesn't appear in this version and has regressed