Launch interractive workflow in debug mode error

When I try multiple Launch interractive workflow, first one run as expected, but the other ones crashes with the following error :
The server did not provide a meaningful reply; this might be caused by a contract mismatch, a premature session shutdown or an internal server error.
The communication object, System.ServiceModel.Channels.ServiceChannel, cannot be used for communication because it is in the Faulted state.

My activity is configurated with a depth of 32, height 1080, and width of 1920…

I try to put some breakpoint inside activities, but never get inside the activity… I Put my credential in the robot that is used by the studio… not working.
I change the Param to not keep connected, or console connection, nothing seems to work. If I put it in normal invoke Workflow it work fine.

Any Idea?