Ashley
This is similar to a previous bug I reported where the layout size was not updating after loading a save with a different layout size.
As you can see in the video, when I enter the scene it shows the parallax on the layer background2 is set to 45,40
Now If I load and older save slot (official saving system) and go to the same layout and it changes to 80,80 (previous settings)
I have no actions to change the parallax or the scale rate of any layer in runtime, In face I wasn't sure if they even existed until I came across this bug, thinking I might need to reset them manually for every layout, or just patching changes after loading.
https://youtu.be/7JSNMwbuRgI