How to reproduce:
1. Create and open a new project
2. Install the ProBuilder package
3. Go into top-view (or rotate the Scene view camera to look from the top) in the Scene view
4. Start drawing a PolyShape with Tools > ProBuilder > Editors > Create PolyShape
5. Close the shape path and observe the Scene view and the Hierarchy

Expected result: A valid PolyShape is created
Actual results: The default material is not applied, the shape cannot be completed by clicking outside its bounds, and a new GameObject is not created in the Hierarchy

Reproducible in: 6.0.2 (6000.0.32f1), 6.0.4 (6000.0.32f1, 6000.1.0a9)
Not reproducible in: 5.2.3 (2021.3.47f1, 2022.3.55f1, 6000.0.32f1), 6.0.1 (6000.0.32f1)

Reproduced on: Windows 11 Pro (23H2)
Not reproduced on: No other environment tested

Notes:
- The shape is removed when the project is restarted
- The shape can be extruded when clicked on the middle point