in fact, I found out what when the cutter location was below the reserve Pilot Chute, once the AAD fired : the cutten loop was too long in between the cutter location and the end of reserve Pilot Chute and had the tendency to keep all the reserve flaps locked together or at least slow down the reserve opening, it is the reason why the rigs manufacturers with reserve PC inside the container like Icon re-located their cutter above the PC.
But in this Icon situation, the issue comes from the reserve pin cover flap which goes too deep inside his location, since Aerodyne changed the reserve cover pin flap length, and because these Aerodyne people have no brain, they did not think about it, since it does not work properly by pulling the reserve ripcord, it certainly does not open with and unconscious skydiver not knocking the reserve container...