Water in HDRP Sample Scene Freezes When Selecting Dropdown in Inspector

Steps to reproduce:

1. Create a new HDRP project
2. Import Water Samples from the HDRP package samples
3. Enable Water in the Quality > HDRP > Water
4. Open a sample scene (e.g., "Rain")
5. In the Hierarchy, click on the "Ocean" GameObject
6. In the Inspector, select and expand a dropdown
7. Observe the water behaviour in the Scene View

Actual results: The water freezes/pauses when a dropdown is selected in the Inspector

Expected results: The water should continue moving even when a dropdown is expanded, similar to the behaviour seen when interacting with checkboxes and sliders

Reproducible with versions: 6000.0.48f1, 6000.1.0f1, 6000.2.0a9

Tested on (OS): Ubuntu 24

Notes: This behaviour is inconsistent with other Inspector UI elements; water should not pause unless a scene-affecting change is triggered