Reproduction steps:
1. Open the “ReproProject“ project
2. Open the “Assets/Scenes/SampleScene“ scene
3. Select the “TestObject“ GameObject in the Hierarchy window
4. Click the “in MyBehaviour.GetType().Name“ button in the Inspector window
5. Observe the Inspector window and the Console window

Expected result: The “MyBehaviour“ script component is highlighted and there are no errors in the Console window
Actual result: “Window MyBehaviour not found.“ error is thrown in the Console window and nothing is highlighted

Reproducible with: 2021.3.37f1, 2022.3.26f1, 2023.2.20f1, 6000.0.0b16

Reproducible on: Windows 11 Pro (22H2)
Not reproducible on: No other environment tested