Reproduction steps:
1. Open the attached “Repro“ project
2. Open the “Assets/Scenes/SampleScene.unity“ Scene
3. Select the “Referencer“ GameObject in the Hierarchy
4. Open the selection menu for the Lowercase field in the Inspector
5. Observe the available selections
Actual result: “Uppercase“ is present and “lowercase“ is missing
Expected result: “lowercase“ is the only listed option
Reproducible with: 2022.3.22f1, 2023.2.16f1, 6000.0.0b13, 6000.0.62f1, 6000.2.13f1, 6000.3.0f1 (5dac2ad68189), 6000.4.0a5, 6000.5.0a2
Couldn’t test with: 2021.3.36f1 (Can’t test due to different behaviour, file name and class name must match)
Reproducible on: M1 MacOS 14.3.1
Workaround: Enable "Object Selector has Advanced UI" option and Advanced Object Selector in Search Engines tab in Preferences.