Behavior Graph “Open” dropdown becomes unresponsive and multiple dropdowns are created on top of each other when the opened Behavior Graph is clicked

Steps to reproduce:

1. Create a new Unity project using the Universal 3D template
2. Install the Behavior package (com.unity.behavior)
3. Create a new Behavior Graph (Assets > Create > Behavior > Behavior Graph)
4. Duplicate the new Behavior Graph
5. Open the original created Behavior Graph
6. Click the "Open" button in the Behavior Graph window
7. Click the "Behavior Graph" option
8. Click the "Behavior Graph 1" option
9. Observe the "Add" dropdown

Actual results: The "Open" dropdown becomes unresponsive

Expected results: The Behavior Graph 1 is opened

Reproducible with versions: 1.0.15 (6000.0.76f1, 6000.3.17f1, 6000.4.10f1)

Not reproducible with versions: 1.0.14 (6000.0.76f1, 6000.3.17f1, 6000.4.10f1)

Can’t test with versions: 1.0.14, 1.0.15 (6000.5.0b11, 6000.6.0a6) (due to [Internal link])

Tested on (OS): MacOS SIlicon Tahoe 26.3, Windows 11