If it helps, I believe I had the two linked before the objective was added so if the trigger was expecting it to come after it might not fire off.

In the Desert Rats campaign Operation Crusader mission, I own the entire map but it's not giving me credit for linking Tobruk with Sidi Barrani and I get a Draw result. What am I missing?

Today when I try to start a new Planetary Supremacy campaign with either Tyranids or Blood Angels, it results in my units standing on a featureless blank map suspended above a desert background.