SubModule List in the Submodule Stripping window can be reordered leaving with malformed list items

Unity: UI Toolkit Controls

6.3.X

6.6.X

6.5.X

6000.5.0f1

6.4.X

6000.4.12f1

Steps to reproduce:

Open the attached project
Switch to the Web platform if it isn't already selected
Open the Web Stripping Tool window (Window -> Web Optimization -> Submodule Stripping)
Click and drag on list items in the Submodules list
Observe the list

Actual results: Some list elements become invisible after reordering, leaving a malformed list

Expected results: List elements cannot be reordered, preventing visual artificats

Reproducible with versions: 6000.2.0a10(1.0.0), 6000.3.10f1, 6000.4.0b11, 6000.5.0a8(1.2.0, 1.2.1)

Can’t test with versions: 6000.0.69f1 (Web Stripping Tool package not available)

Tested on (OS): macOS 26.3, Windows 11