Avoid unnecessary changes when add child #1200

Job	Run time
Build for Windows using DirectX	8m 25s
Build for Ubuntu (GLFW) using OpenGL	3m 39s
Build for Windows using OpenGL	9m 50s
Build for Ubuntu using OpenGL	2m 59s
Build for macOS using OpenGL	1m 29s
Build for macOS using Metal	1m 37s
Build for iOS Xcode using Metal	4m 42s
Build for Web (Emscripten) using WebGL 2	8m 26s
Build for macOS Xcode using Metal	2m 13s
	43m 20s

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