Panel Settings GameObject gets duplicated when EventSystem GameObject is in the Scene and UI Document GameObject is disabled and reenabled

How to reproduce:
1. Open the ‘World Space UI Bug.zip' project
2. Open the ‘SampleScene’ scene
3. Enter Play Mode
4. In the Hierarchy expand the ‘EventSystem’ dropdown menu
5. Select ‘Test’ GameObject
6. In the Inspector repeatedly enable/disable the 'Test’ GameObject
7. Observe the result in the Hierarchy

Expected result: No ‘New Panel Settings' GameObjects are created
Actual result: Multiple 'New Panel Settings' GameObjects are created

Reproducible with: 6000.2.0a8, 6000.2.6f1, 6000.3.0b5, 6000.4.0a1
Not reproducible with: 6000.0.58f1, 6000.2.0a7

Reproducible on: macOS 26.0.1 (M1 Max)
Not reproducible on: No other environments tested