Custom Inspector creates a List of Objectfields incorrectly

Reproduction steps:
1. Open the user’s attached project (“CustomInspectorRepro”)
2. Open the “Assets/Scenes/SampleScene.unity” scene
3. In the Hierarchy window select the “GameObject” GameObject
4. Observe the ObjectField list located under the "Car(Script)" Component in the Inspector window

Expected result: All ObjectFields are created correctly
Actual result: The 13th ObjectField in the list is missing

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

Reproducible on: Intel macOS 13.0 (ventura)

Note: Commenting the “hello“ TextField code from the “CarInspector.cs” script creates an unassignable ObjectField in the 13th element of the Custom Inspector.