Just played this mission. It took me probably 5-10 minutes to successfully refuel, then I used the spacebar prompt to tell my wingman to take on fuel. I heard the radio message from the tanker indicating that he was taking on fuel, but after that my wingman just flew in formation maybe 100-200 feet above the tanker indefinitely, and I couldn't get the rest of the mission to advance. Tried time accelerating for a while, also tried flying on to the next waypoints, but didn't have any luck.