Reproduction steps:
1. Create a new project
2. Open Package Manager (Window > Package Management > Package Manager)
3. Press “+” button and select “Create package”
4. Enter long name and press enter to create a package
5. Select newly created package, Manage > Edit Manifest
6. In Inspector Edit any field and make sure that “Apply” button is disabled afterwards
7. Click on any other window and observe

Actual result: “Inspector - Unsaved Changes Detected” window pops up and after pressing “Save” button changes are saved
Expected result: “Inspector - Unsaved Changes Detected” window does not pop-up and changes to the Package Manifest are not saved

Reproducible with: 6000.3.0b6, 6000.4.0a2
Couldn’t reproduce with: 2021.3.58f1, 2022.3.68f1, 6000.0.60f1, 6000.2.8f1 (No “Create package” option)

Reproduced on: macOS Sequoia 15.4 (M4)