ID 518507 - There is no difference when color picking with CTRL/CMD versus CTRL/CMD+ALT shortcuts in the Ultimatte node

Problem summary
There is no difference when color picking with CTRL/CMD versus CTRL/CMD+ALT shortcuts in the Ultimatte node.
 
Customer reported version
Nuke 13.1v2
 
Customer reported platform
Linux
 
Steps to reproduce
1) In Nuke, add a Read node featuring greenscreen footage.
2) Add an Ultimatte node and press 1 on the keyboard to view it.
3) In the Viewer Properties for the Ultimatte node, click the Screen color swatch knob.

4) Use CMD/CTRL to pick a color of the upstream Read node in the Viewer.
5) Select the overlay color swatch knob, then press and hold CTRL and click + drag the mouse in the Viewer.
6) Select the spill color swatch knob, then press and hold CTRL and click+drag the mouse in the Viewer.
7) Clear the selection for the Screen color swatch knob.
8) Repeat steps 4-6 by adding ALT to the modifier [CMD/CTRL+ALT], observing the selection made for each.
 

 
Expected behavior
The CMD/CTRL+ALT shortcut should color pick from the original plate and display a difference than when just using CMD/CTRL.
 
Actual behavior
The CTRL/CMD color picker modifier behaves the same with CMD/CTRL+ALT when color picking in the Ultimatte node.
 
Workaround
There is no available workaround at this time.
 
Reproduced by Support in:
Nuke 13.2v3 - Windows 10, CentOS 7, macOS 10.15
Nuke 13.2v1 - Windows 10
Nuke 13.1v1 - Windows 10,
Nuke 13.0v1 - Windows 10
Nuke 12.0v1 - Windows 10
Nuke 11.0v1 - Windows 10
Nuke 10.0v1 - Windows 10
Nuke 9.0v1 - Windows 10, CentOS 7, macOS 10.15
 
Earliest version tested
Nuke 9.0v1 - This issue appears to be in all tested versions of the product