How to reproduce:
1. Open the attached “case IN-14156” project
2. Open the “SampleScene” Scene
3. Multi-select “Test_1” and “Test_2” GameObjects in the Hierarchy
4. Select one of the array elements by clicking on the element’s name area in the Inspector
5. Delete the selected element

Expected result: Array element is deleted, and a complete array is copied to all other selected objects
Actual result: In 1 of 5 cases, an array element is deleted and an array is copied, but with “Retrieving array element that was out of bounds” errors thrown by the “UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&)” method

Reproducible with: 2022.2.0a9, 2022.2.0b6, 2023.1.0a8
Not reproducible with: 2020.3.38f1, 2021.3.8f1, 2022.1.14f1, 2022.2.0a8

Reproduced on: macOS 12.3 (Intel)

Note:
- Issue mainly reproduces when at selection clicking the element name area
- In some versions, nothing is deleted or copied, but additionally “NullReferenceException: Object reference not set to an instance of an object” error is thrown