Script's icon does not change back to the default on Undo in the Project window.

The scripts icon is visible in the Project window under assets and in the Inspector window. On performing Undo, the script's icon does not change back to the default icon in the Project window and changes as expected in the Inspector window

Steps to repro:
1. Create a new project
2. Project window > Two-Column Layout > Create > C# Script
3. NewBehaviourScript > Inspector > Select Icon > change Icon
4. Edit > Undo > Undo Set Icon on GameObject
5. Observe scripts icon in inspector window changes back but the icon in Project window does not change back to default.

Actual Result: Undo does not change the script's icon in the package manager window

Expected Result: Undo should change the script's icon in the package manager window

Occurring on: 2021.2.0a15, 2021.1.5f1, 2020.3.6f1, 2019.4.25f1, 2019.4.0f1

Working Fine: 2018.4.34f1, 2018.4.0f1

Environment: Occurring on macOS and Windows 10