Saved UI Document changes are not reflected in the Game view when Play mode has been entered and exited

Steps to reproduce:

1. Create a new project using 3D URP project
2. In the Hierarchy, create a Panel Renderer
3. Create a new UI Document and assign it to Panel Renderer Component
4. Open the .uxml in UI Builder
5. Add any well visible element (e.g. Button)
6. Save and observe the element appears in Game view
7. Enter and exit Play mode
8. Add another element, duplicate the same or make any visible change in UI Builder
9. Save and observe the Game view

Actual results: Changes saved after exiting Play mode (7th step) are not reflected in the Game view

Expected results: Changes saved after exiting Play mode are reflected in the Game view immediately, as they are before Play mode is entered

Reproducible with versions: 6000.5.0b9, 6000.5.8f1, 6000.6.0b9, 6000.7.0a5

Not reproducible with versions: 6000.3.21f1, 6000.5.0b8

Tested on (OS): Windows 11, macOS 26.5

Notes:

• Only reproduces once Play mode has been entered and exited at least once. Before the first Play mode entry, saving updates the Game view correctly
• Entering Play mode again displays the current state, but the Game view does not update on save for the rest of the session
• With in-scene UI Authoring on, newly added elements are also missing from the Hierarchy, not just the Game view