How to reproduce:
1. Create a new empty project
2. Create a new Parent Game Object in the Hierarchy
3. Create multiple Child Game Objects for the Parent Game Objects
4. Select the multiple Child Game Objects and delete them
5. Undo the deletion
6. Redo the deletion of the Game Objects (Edit -> Redo Delete Game Objects)

Expected result: Nothing of note happens
Actual result: Warnings are thrown "Child GameObject 'GameObject (9)' was not registered into undo system and became dangling during an undo operation."

Reproducible with: 2022.1.0a15, 2022.1.0b15, 2022.2.0a10
Not reproducible: 2019.4.37f1, 2020.3.33f1, 2021.3.0f1, 2022.1.0a14