How to reproduce:
1. Open the attached “IN-133084“ project
2. Open the “SCENE” scene
3. Open the Input Debug window (Window > Analysis > Input Debugger)
4. Enter Play mode
5. Observe the Input Debug window, notice the project-wide actions
6. In the Hierarchy, delete the “UIDocument“ GameObject
7. Observe the Input Debug window, note the Input Actions under “Actions“

Actual result: Project-wide Actions disappeared
Expected result: No changes were made to the Input Actions

Reproducible with: 6000.2.0a6, 6000.3.7f1, 6000.4.0b7, 6000.5.0a6
Not reproducible with: 6000.67f1, 6000.2.0a5

Reproducible on: Windows 11
Not reproducible on: No other environments tested

Workaround: Install the UGUI package and add an empty GameObject with an Event System in scenes where GameObjects with UI Document Components are being deleted