Duplicating a control with children swaps first and second child around

[xxSeys1]

Issue description:

When duplicating a control with CTRL + D the order of the first and second child is swapped.

Here's a screenshot of the "aftermath" of the bug

Steps to reproduce:

This is the thing: I have no idea.

Every bug I find in the ui editor is unreplicatable for whatever reason. It happened out of nowhere, an editor restart "fixed" it.

I'll try to repro this but no promise that I can.

Minimal reproduction project:

none

Flax version:

1.8.1

[mafiesto4]

Test prefab: UI Prefab.zip

I was unable to repoduce it for now.