Unable to switch Post-Process Layer to PostProcessing LayerMask

Hello all,

II got an issue on PostProcessing Effect : When I try to change Post-Process Layer to the one I'm interesting to (8: Postprocessing) I always got the same result : Mixed...

Crazy thing is if I change this inside the editor everything works perfectly.

I'm using PostPorcessing-Stack V2.3..

See the code & the capture :

         PostProcessLayer postLayer = go.AddComponent<PostProcessLayer>();
         
         postLayer.volumeTrigger = go.transform;
         postLayer.volumeLayer.value = go.layer;
         postLayer.antialiasingMode = PostProcessLayer.Antialiasing.FastApproximateAntialiasing;
 
         postLayer.Init(PPResources);