Steps to reproduce:

1. Create a new Unity project using the Universal 3d template
2. Open the Accessibility Hierarchy Viewer window (Window > Accessibility > Hierarchy Viewer)
3. Resize the tabs by sliding the middle line all the way to the left
4. Observe the Accessibility Hierarchy Viewer window
5. Dock the Accessibility Hierarchy Viewer window
6. Resize it vertically to smallest possible
7. Repeat step 4

Actual results: After step 4, the Hierarchy tab is completely gone as it doesn't have a minimum width set and a visual artefact, a "triangle" appears in the bottom left of the window. After step 7, the text label in the middle of the window overlaps with other UI elements as its position is not restricted

Expected results: The tabs have a minimum width set, the text label has its position restricted

Reproducible with versions: 6000.0.52f1, 6000.1.9f1, 6000.2.0b8, 6000.3.0a1

Tested on (OS): macOS Silicon Sequoia 15.5