Duplicating set variable node doesn't duplicate with hard coded values

Steps to reproduce:

1. Create and open an empty project
2. Install com.unity.behavior
3. Create and open a behavior graph (Assets > Create > Behavior > Behavior Graph)
4. Right-click on an empty area and select Add...
5. Add a "Set Variable Value" node
6. Create a blackboard float variable
7. Assign the created float variable to the first variable of the Set Variable Value node
8. Hardcode number '1' in the second variable of the Set Variable Value node
9. Duplicate the Set Variable Value node (Right-click > Duplicate)

Actual results: The duplicated node doesn't duplicate with the hardcoded value and sets it to '0'

Expected results: The duplicated node preserves the hardcoded value and sets it to '1'

Reproducible with versions: 1.0.6

Tested on (OS): MacOS (M1) 15.1.1