How to reproduce:
1. Open the user's attached project
2. In the Project window open Assets > AddressableAssetsData > AssetGroups
3. Shift select RobGroup1, RobGroup2, RobGroup3, and RobGroup4
4. In the Inspector expand the 'Advanced Options' section
5. Uncheck the 'Include in Build' checkbox
6. Close the Unity Editor
7. Reopen the project
8. In the Project window open Assets > AddressableAssetsData > AssetGroups
9. Select the RobGroup4 group
10. In the Inspector expand the 'Advanced Options' section

Expected result: The 'Include in Build' checkbox is unchecked
Actual result: The 'Include in Build' checkbox is checked

Reproducible with: Addressables 1.16.16, 1.17.6-preview (2018.4.32f1, 2019.4.21f1, 2020.2.7f1, 2021.1.0b10, 2021.2.0a7)
Not reproducible with: Addressables 1.16.15 (2018.4.32f1, 2019.4.21f1, 2020.2.7f1)
Cannot test with: Addressables 1.16.15 (2021.1.0b10, 2021.2.0a7) (the package version is not supported)

Notes:
- The issue is reproducible only when selecting multiple groups (2 or more)
- The issue affects all Addressable Group settings in the Advanced Options section (settings outside the mentioned section are applied correctly)
- The issue is reproducible always with the last selected group (e.g. if you select 4 groups after reopening the project the settings of the 4th group will be reverted)