Reproduction steps:
1. Open the “ReproProject“ project
2. Open the “Assets/Scenes/SampleScene“ scene
3. Open the “Assets/TestAnimatorController“ Animator Controller
4. Delete the “StateMachine“ State Machine in the Animator Window
5. Save the project (File > Save)
6. Open the “Assets/TestAnimatorController“ Animator Controller with a text editor application
7. Search for “ThisTransitionGoesAwayFromStateMachine“
Expected result: Only the Animator Parameter “ThisTransitionGoesAwayFromStateMachine“ exists
Actual result: The Animator Parameter and the Animator Transition “ThisTransitionGoesAwayFromStateMachine“ exists
Reproducible with: 2021.3.33f1, 2022.3.15f1, 2023.2.4f1, 2023.3.0a19
Reproducible on: Windows 11 Pro (22H2)
Not reproducible on: No other environment tested