Unity Issue Tracker - A second unparented GameObject is created when duplicating a Prefab with a child that has HideFlags.DontSave

Fixed

2023.2.X

2023.1.X

2022.3.X

Won't Fix

2022.2.X

2021.3.X

2020.3.X

Please make sure to call PrefabUtility.RecordPrefabInstancePropertyModifications(this) in SubObjectHideInHierarchy.cs after adding the child object and setting the hideflag. This ensures that the changes to the instance are registered, and results in correct behaviour when duplicating.

The issue didn't exist in 2021.3. Please make sure to call PrefabUtility.RecordPrefabInstancePropertyModifications(this) in SubObjectHideInHierarchy.cs after adding the child object and setting the hideflag. This ensures that the changes to the instance are registered, and results in correct behaviour when duplicating.

Reproduction steps:
1. Open the attached project “BugDuplicatedObjectWithHideFlags”
2. Select “ObjectWithAutoCreatorAsPrefabInstance” in the Hierarchy window
3. Duplicate the selected GameObject

Expected result: there is only one “~SubObjectHidden” child GameObject
Actual result: there are two “~SubObjectHidden” GameObjects and the second one is unparented and not affected by the SubObjectHideInInspector Script on the parent

Reproducible with: 2022.2.8f1, 2023.1.0b5, 2023.2.0a4
Not reproducible with: 2020.3.45f1, 2021.3.18f1

Reproducible on: macOS 12.4 (Intel), Windows 11 (user’s)

Note: in 2020.3.45f1 and 2021.3.18f1, the child is not unparented

A second unparented GameObject is created when duplicating a Prefab with a child that has HideFlags.DontSave

Unity: Scene Management

Fixed

Won't Fix

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A second unparented GameObject is created when duplicating a Prefab with a child that has HideFlags.DontSave

Unity: Scene Management

Statuses

Fixed

Won't Fix

Resolution Notes

2023.2.XFixedPlease make sure to call PrefabUtility.RecordPrefabInstancePropertyModifications(this) in SubObjectHideInHierarchy.cs after adding the child object and setting the hideflag. This ensures that the changes to the instance are registered, and results in correct behaviour when duplicating.

2023.1.XFixedPlease make sure to call PrefabUtility.RecordPrefabInstancePropertyModifications(this) in SubObjectHideInHierarchy.cs after adding the child object and setting the hideflag. This ensures that the changes to the instance are registered, and results in correct behaviour when duplicating.

Description

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