During one of my recent games, I noticed how group jumping with large fleets is still fundamentally broken due to pathfinding issues. The problem stems from the fact that ships automatically begin preparing for phase jump as soon as they reach the perimeter of the outer ring of the gravity well. When large fleets are thrown into the mix, this effectively pretty much causes a catch-22 scenerio: Due to pathfinding issues, this idle front group of the fleet blocks the remaining parts of the from leaving the barring influence of the gravitational pull behind. I've seen this cause delays lasting up to 10 minutes. Manually ordering the fleet to move to the edge of the well before giving them the order to jump speeds up the process considerably.