Steps to reproduce:
1. Create a new project or open an existing one
2. Create a new Cube GameObject in Hierarchy
3. Select the Cube
4. Click on the Materials dropdown count in the Mesh Renderer component
5. Enter 0 and click Enter key
6. Undo it with Cmd+Z or Ctrl+Z

Expected results: Inspector component don't get garbled
Actual results: Inspector components get garbled (see attached pic in edits)

Reproducible with: 2020.3.31f1, 2020.3.32f1
Not reproducible with: 2019.4.37f1, 2020.3.30f1, 2021.2.13f1, 2022.1.0b12, 2022.2.0a8 (likely fixed with the dropdown change)

Notes:
- Alternate steps to reproduce the issue would be to add Mesh Renderer component and then Mesh Filter component to an empty GameObject
- Issue goes away after a proper repaint, for example picking any other GameObject and then picking the affected one