Reproduction steps:
1. Create a new project
2. Create any Standard Element (GameObject > UI Toolkit > Standard Elements)
3. Create UI Document
4. Right-click on the newly created Standard Element and select “Open in UI Builder” option
5. Right-click on the Element and select "Create Template" in the UI Builder window
6. Observe the Console
Actual result: "Assertion failed on expression: 'GetPropertyPath().empty()'
UnityEditor.RetainedMode:UpdateSchedulers ()" error is thrown
Expected result: No errors or warnings are thrown
Reproducible with: 6000.6.0b1, 6000.6.0b5, 6000.7.0a3
Couldn’t reproduce with: 6000.0.80f1, 6000.3.20f1, 6000.5.5f1, 6000.6.0a6 (No Standard Elements option), 6000.6.0a7 (No “Open in UI Builder” option)
Reproduced on: Windows 11, macOS Tahoe 26.5 (M4)
Note: Issue is not reproducible with Elements created in UI Builder window