Empty GameObjects are created without Skinned Mesh Renderers when using AnimatorUtility.DeoptimizeHierarchy() on FBX files with same-named GameObjects

How to reproduce:

1. Open the project “IN-99335_Deoptimize”
2. Enter Play Mode
3. Observe the Hierarchy → “Character_Gun_DeoptimizedClone”

Expected result: Should not contain extra “Body” and “Head” nodes without SkinnedMeshRenderer
Actual result: Contains “Body” and “Head”, both without SkinnedMeshRenderer

Reproducible with: 2022.2.0a5, 2022.3.61f1, 6000.0.48f1, 6000.1.1f1, 6000.2.0a10
Could not test with: 2022.2.0a2 (Visual Studio Editor “ScriptCompilerOptions” errors)

Reproducible on: Windows 11
Not reproducible on: No other environments tested

Notes:

• AnimatorUtility.DeoptimizeTransformHierarchy() is being called by the Deoptimizer.cs script
• If any Package issues appear, you can remove all packages