Steps to reproduce:
1. Create new Unity project
2. Import the "MySimpleGraph" script
3. In the Project window, right-click -> Create -> Graph Toolkit Samples -> Simple Graph -> Open the Graph
4. In the Blackboard, press “+” button to add New Variable
5. Select New Variable
6. Using shortcut, duplicate New Variable (command+D or ctrl+D)
7. Observe the Blackboard

Actual results: Duplicate keyboard shortcut doesn’t duplicates Variables in the Blackboard
Expected results: Duplicate keyboard shortcut duplicates Variables in the Blackboard

Reproducible with versions: 6000.4.0b7, 6000.5.0a6

Tested on (OS): 24.04 (reproducing), macOS Silicon Tahoe (M1) (not consistent)

Notes:

•  on MacOS issue is not consistent, sometimes duplication shortcut works, after sometime - it doesn’t.