How to reproduce:
1. Create the new URP Sample project
2. Open the "TerminalScene"
3. Go to Window -> Rendering -> Lighting Search
4. Select the multiple lights with the "Shape" parameter at the same time
5. Change the "Shape" and observe the results
Expected results: The "Shape" changes on all lights at once
Actual results: The "Shape" changes only on one light
Reproducible with: 6000.5.0b2, 6000.6.0a2
Can't test with: 6000.0.72f1, 6000.3.13f1, 6000.4.2f1
Reproducible on: macOS Tahoe 26 (M1)
Not reproducible on: No other environment tested
Note: Not reproducible with the Light Explorer