How to reproduce:
1. Open the attached “IN-87971” project
2. Open the “SampleScene” Scene
3. Create an empty GameObject in the Scene
4. Add the “TestScript” Script from the Assets folder to the GameObject components
5. In the “Defined Atlased Sprite” property input field select the SpriteAtlas in the Assets folder
6. Select any sprite from the Sprite Atlas in the Subasset input field
7. Observe the Console window

Expected result: No errors occur
Actual result: IndexOutOfRangeExcpetion error occurs

Reproducible with: 2.0.3 (2023.3.0a2), 2.2.2 (6000.0.26f1, 6000.1.0a3)
Not reproducible with: 1.22.3 (2021.3.45f1, 2022.3.0f1, 2022.3.52f1)

Reproduced on: Windows 11, macOS (User system)
Not reproduced on: No other environment tested

Note: After doing the reproduction steps, selecting the affected GameObject the property “Defined Atlased Sprite” input field becomes blank, can’t select a Sprite Atlas or a Subasset anymore and more IndexOutOfRangeException errors appear in the Console