Reproduction steps:
1. Open the “VSWorkspaceExample” folder
2. Open the “VSWorkspaceExample.code-workspace” using VS Code
3. Make sure that the “ImportantCode.cs” script is opened inside the “Packages > example_package > Scripts” in VS Code
4. Open the “DemoUnityProject” using Unity from the “VSWorkspaceExample” folder
5. Open the "SampleScene" inside the “Scenes” folder
6. Enter Play Mode
7. Click on the error inside the Console window
8. Observe the VS Code editor window

Expected results: The C# file opens in the previously opened VS Code Workspace
Actual results: The C# file opens in a new VS Code window

Reproducible with: 2021.3.39f1, 2022.3.34f1, 6000.0.7f1

Reproducible on: macOS 14.5 (by reporter), Windows 11
Not reproducible on: No other environments tested