ID 608894 - The Cryptomatte's Picker knobs cannot select/deselect every matte

Problem summary:
The Cryptomatte's Picker knobs cannot select/deselect every matte
 
Customer reported version:
Nuke 15.1v9
 
Customer reported platform:
Windows 10
 
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 bunny_CryptoObject.exr image available here
3) Create a Cryptomatte node and press the 1 key to View it
4) Ensure the Add Picker knob is enabled in the Properties
5) Use Ctrl+Shift in the Viewer to Pick a region that encompasses the entire image
6) Create another Cryptomatte node and connect it to the Read node
7) In its Properties, add a wildcard character to the Matte List to select all mattes
8) Compare the two Cryptomatte nodes and observe how the results differ:

 
Expected behavior:
When using the Cryptomatte's Picker Add/Remove knobs, all mattes inside the selected region should be added or removed from the Matte List. 
 
Actual behavior:
Certain mattes in cryptomatte files cannot be accessed by the Picker Add or Picker Remove knobs and making a selection in the Viewer. 
 
Workaround:
Besides manually entering the matte name into the Matte List, there is no known workaround at this time.
 
Reproduced by Support in:
Nuke 16.0v6 - Windows 11, macOS 14 Sonoma
Nuke 15.0v1 - Windows 11
Nuke 14.0v1 - Windows 11
Nuke 13.0v1 - Windows 11
 
Earliest version tested:
Nuke 13.0v1 - This feature (native Cryptomatte node) did not exist before this version