Steps to reproduce:

1. Create a new project
2. Open Edit > Preferences > External Tools
3. Make sure Visual Studio is selected as the External Script Editor
4. Open Edit > Preferences > Asset Pipeline
5. Set Auto Refresh to Enabled
6. Create a new C# script, or modify an existing C# script, using Visual Studio or Visual Studio Code
7. Save the script
8. Wait for Unity to automatically refresh the script
9. Open Edit > Preferences > Asset Pipeline again
10. Set Auto Refresh to Disabled
11. Modify the same C# script again
12. Save the script
13. In the Unity Editor, select the modified script in the Project window
14. Observe the Console

Actual Result: The Console starts spamming warnings such as [Worker4] Import Error Code:(4)
Expected Result: The Console remains clean

Reproducible with: 6000.0.0f1, 6000.0.76f1, 6000.3.16f1, 6000.4.9f1, 6000.5.0b10, 6000.6.0a6

Reproducible on: Windows 11
Not reproducible on: No other environments tested

Notes:
-Reproducible when scripts are modified in both Visual Studio and Visual Studio Code
-A manual refresh of the changed script resolves the issue