Reproduction steps:
1. Open the attached project “PolyBreakProject”
2. Open the “Assets/Scenes/SampleScene” scene
3. Open the Polybrush window (Tools > Ploybrush > Polybrush Window)
4. Select any paint tool in the Polybrush window
5. In the Hierarchy select “Cube” GameObject
6. In the Scene view use the selected Polybrush tool on the “Cube” GameObject

Expected result: The tools change the appearance of the cube depending on the selected tool
Actual result: The Polybrush tools corrupt the GameObject and “Mesh.vertices is too small. The supplied vertex array has less vertices than are referenced by the triangles array.” error is thrown in the Console

Reproducible with: 1.1.4 (2020.3.47f1, 2021.3.24f1, 2022.2.17f1, 2023.1.0b13, 2023.2.0a12)
Not reproducible with: 1.1.3 (2020.3.47f1)

Reproducible on: macOS 13.3 (Intel)