Material Shader dropdown is misplaced horizontally to the left when navigating into certain submenus with narrow Inspector width

Steps to reproduce:

1. Create a new project using Universal 3D template
2. Reset Editor layout to default or make the width of the Inspector narrow
3. In the Project window, right-click > Create > Material
4. Select the newly created Material
5. In the Inspector, click on the dropdown next to "Shader"
6. Click on the "Built-in (Deprecated)" option
7. Click on the "Mobile" option
8. Observe the dropdown gets misplaced to the left
9. Click on the "Particles" option
10. Observe the dropdown goes back to correct position

Actual results: When navigating into certain submenus (e.g. "Mobile"), the dropdown window is misplaced horizontally to the left and detaches from the Shader button, then snaps back to the correct position when navigating into another submenu (e.g. "Particles")

Expected results: The dropdown window stays anchored to the Shader button at every level, with no horizontal misplacement

Reproducible with versions: 6000.5.0f1, 6000.6.0a7

Not reproducible with versions: 6000.4.11f1, 6000.6.0a6

Tested on (OS): Windows 11

Notes:

• Could not reproduce on macOS, the dropdown there gracefully shifts back into place