Reproduction steps:
1. Open the user's attached project
2. Open "Assets/Scenes/SampleScene"
3. Select GameObject "Test" from the Hierarchy
4. In the Inspector select one of the array items from the "Test Int" array
5. Press the "Delete" key on the keyboard

Expected result: Array item is deleted with no errors in the Console
Actual result: Console throw "NullReferenceException: : SerializedProperty is null" and "UnityEditor.SerializedProperty:get_depth ()" errors

Reproducible with: 2021.1.17f1, 2021.1.28f1, 2021.2.0b6, 2021.2.1f1, 2022.1.0a2, 2022.1.0a14
Not reproducible with: 2019.4.32f1, 2020.3.22f1, 2021.1.16f1, 2021.2.0a1, 2021.2.0b5, 2022.1.0a1

Notes:
- it may take a few tries to reproduce the issue
- not reproducible with string, char or bool data type arrays