Serialized List items with "PropertyDrawer" change when adding or removing list items

How to reproduce:
1. Open the attached project
2. Open Scene “SampleScene“ (Assets/Scenes)
3. Select the “Main Camera“ GameObject in the Hierarchy
4. Expand the “Settings“ menu and then, the “Items“ list in the “Example Component” Component
5. Delete two items by pressing the minus symbol at the bottom right of the item list
6. Add an two items to the list by pressing the plus symbol at the bottom of the “Items” list

Expected result: Items are added and removed without affecting the already existing items
Actual result: The already existing items change

Reproducible with: 2020.3.42f1, 2021.3.14f1, 2022.1.23f1, 2022.2.0b15, 2023.1.0a19

Reproduced on: macOS 12.5 (Intel)

Note:

• Might have to delete or remove more items than said in reproduction steps to reproduce the issue
• In newer versions, deleting or adding items affects other items only when changing an existing list item and then adding or deleting a list item (doesn’t work if the changed item is the last one on the list)