Reproduction steps:
1. Open the attached “ASDQWE” project
2. In the Project Window, right-click the “Assets/ISI Lab” folder and select “Export Package…”
3. In the Exporting Package Window, press the “Export…” Button
4. In the Export Package… Window, select a project to export the package into, name the package, and press the “Save” Button
5. Open the project that the package was imported into
6. In the Project Window, double-click the package to extract it
7. In the Import Unity Package Window, press the “Import” Button
8. In the Project Window, select “Assets/ISI Lab/LBS/LBS.asmdef” Assembly Definition Asset
9. In the Inspector Window, observe the Assembly References
Expected result: “Newtsoft.json.dll" is still referenced
Actual result: “Newtsoft.json.dll" reference is lost
Reproducible with: 2022.3.5f1
Could not test with: 2021.3.28f1 (two “error CS0246: The type or namespace name 'IntegerField' could not be found” errors), 2023.1.5f1, 2023.2.0b1 (The Project Window displays no Assets)
Reproducible on: Intel macOS 13.4.1