Canvas do not respect sorting layer when using different camera in multiple scene loaded additively

Hi !

I have a specific use-case where I load multiple scene additively. Each scene has one or more canvas in "screen space - camera" mode using its scene camera. I use sorting layer to sort my different canvas in the same scene.

But when I load one scene additively, they don't seem to respect the sorting layer. Let's say I have a scene S1 with a canvas C1 on the sorting layer L1, when I load scene S2 on top of it with a canvas C2 set to the sorting layer L2, it doesn't not matter if L1 is lower or above L2, C2 will always appear on top of C1.

Is there a way to fix this ? Can I use a "common" camera that will be store in a common scene ?