"IMGUIContainer cannot be used in a panel drawn by cameras." error thrown when adding IMGUI Container in UI Builder > Hierarchy

Steps to reproduce:

1. Open attached Unity project "ImguiContainer" from Google Drive link
2. Open "NewUXMLTemplate 1.uxml" in UI Builder window
3. Drag "IMGUI Container" to the Hierarchy 
4. Observe the Console window

Actual results: Errors "IMGUIContainer cannot be used in a panel drawn by cameras." spammed in the Console window

Expected results: No errors in the Console window

Reproducible with versions:  6000.0.49f1, 6000.1.4f1, 6000.2.0b2

Tested on (OS): Windows 11