Editor: Actors are added as children of one another by default

[Tnnv]

Description

Actors are added as children of one another by default via hierarchy window, without visible selection of current actor.

Prerequisites

[Please describe the state of Engine or Tools before the issue]

Steps to Reproduce

1. Add actor via + button in Hierarchy window
2. Add second actor via + button in Hierarchy window
3. Add third actor via + button in Hierarchy window

Expected behavior:

Actors are added to the scene root with zero transform.

Actual behavior:

Actors are added as children of one another.

Versions

Build Version: 2025.3
Build Revision: 51addc2
Build CPU Architecture: x86_64
OS Name: Windows 10 Version 2009
OS CPU Architecture: x86_64
Kernel version: 10.0.26100

Additional Information