Here is how I think everything is drawn :
Firstly a scene with only one empty layer is created. After one second, this scene changes to a second one and also creates an Actor on the latter. (using "create hero at (x:90 y:300) at Front in the next scene")
The second scene has two background layers positioned 'under' all the layers in the layer list , and 9 other layers.
So the actor appearing in the second scene Is behind all layers except the two background layer, and the first layer called 'Floor + InvisibleWal' ( see layers screenshot in attachment ).
Using "create actor in Front" makes the 'open inventory' behaviour (see attachment) work, but places my actor behind almost all the layers. And if I "create actor in middle", the 'open Inventory' behaviour makes all the layers, except backgrounds, disappear, but the actor Is in front of every layers
What's happening ?