Switching Size Modes doesn't always adjust UI size

Steps to reproduce:

1. Open the attached Unity project "SizeMode" from Google Drive link
2. Open "SampleScene" Scene
3. In Hierarchy window select "UIDocument"
4. In Inspector window change Size Mode from Fixed to Dynamic
5. Observe the UI elements in Scene view/Game view

Actual results: UI doesn't adjusts itself to the content size

Expected results: UI adjusts itself to the content size

Reproducible with versions: 6000.2.0b2

Tested on (OS): Windows 11