UXML object is collapsed in the Scene Hierarchy after the file is modified

Unity: UI Toolkit Authoring Framework

Won't Fix

6.5.X

6.4.X

6.3.X

This feature is still experimental and under two feature flags. This is a known UX quirk that happens because when you change a value from the UI Builder, it will reload the content of the UI Document. When the content is reloaded, new instances of visual elements will be created, which will not be the same as the previous ones.

Steps to reproduce:

Open the attached project
Open the SampleScene
Fully expand the UI Document object in the Scene Hierarchy
Open NewUXMLTemplate.UXML file in UI Builder
Make any changes to the file (for instance, change the name of one of the visual elements)
Observe the UI Document in the Scene Hierarchy window

Actual results: The UI Document object is collapsed after making changes in the file

Expected results: The UI Document remains expanded

Reproducible with versions: 6000.3.0a3, 6000.3.0f1, 6000.4.0a5, 6000.5.0a2

Can’t test with versions: 6000.0.63f1, 6000.2.14f1, 6000.3.0a2 (UI Authoring Hierarchy integration was not yet available)

Tested on (OS): Ubuntu 24.04, macOS 26.1

Notes:

The project needs to use Hierarchy V2 and have UI Authoring Hierarchy integration setting enabled in the Project Settings

UXML object is collapsed in the Scene Hierarchy after the file is modified

Unity: UI Toolkit Authoring Framework

Won't Fix

Prioritise and Follow this issue

Have a workaround or additional info about this issue?

UXML object is collapsed in the Scene Hierarchy after the file is modified

Unity: UI Toolkit Authoring Framework

Statuses

Won't Fix

Resolution Notes

Description

Prioritise and Follow this issue

Have a workaround or additional info about this issue?