How to reproduce:
1. Create a new Unity project and install the Visual Effect Graph package
2. In the Project window, right-click -> Create -> Visual Effects -> Visual Effect Graph -> Any graph -> Create
3. Navigate to the "Initialize Particle" block 
4. Open all dropdowns one by one as fast as possible
5. Observe the results

Expected results: The dropdowns are consistently opened in the right place
Actual results: Some dropdowns are opened with an offset

Reproducible with: 6000.0.39f1, 6000.1.0b7
Not reproducible with: 6000.2.0a4

Reproducible on: macOS Sequoia 15.3 (M1), Windows 11
Not reproducible on: No other environment tested