How to reproduce:
1. Open the project “121530_Coroutine Bug”
2. Open the Test Runner tab (Window → General → Test Runner)
3. Run the “TestEditorCoroutine” test
4. Observe the Console and Test Runner tabs
Expected result: Test passes without an error in the Console tab
Actual result: Test passes with the NullReferenceException error in the Console tab
Reproducible with: 2023.1.0a1, 6000.0.60f1 (61dfb374e36f), 6000.2.9f1, 6000.3.0b7, 6000.4.0a3
Reproducible on: Windows 11
Not reproducible on: No other environments tested