How to reproduce:

1. Open attached project
2. Open scene1.unity
- Scene contains a simple canvas with a single button and some text
- The button calls the GotoScene.DoGotoScene method with the parameter stackedscene which loads the scene stackedscene.unity
- stackedscene.unity contains some simple canvas shapes that are stacked in a specific order
3. Follow on-screen instructions
- Note how the shapes are now stacked in a different order than if loading the scene directly