Ran into this problem tonight in Crossroads tonight. Running on Windows 7 64-bit with CBA, Refined Vehicles, ShackTac Fireteam HUD, Agile Helicopters, Improved Ragdoll, map Autobrightness, Ammobox with VAS, and Gesture VTS mods. I am not convinced that these are a contributing factor.

After taking the rendezvous point and LZ Connor I proceeded south west towards Agios Cephas I eliminated the three riflemen in the open using weapon mounted grenades and then flanked west south west around the buildings and approached coming up the hill. (I have a save point I can send in that will show exactly where I was approaching from).

If I continued around the stone building and began clearing the buildings with the shack first the next mission object trigger would not fire. If this trigger doesn't fire, the rest of the fire team will not advance. To get it to fire I had to proceed north into and enter the stone building from the west side.

After the enemy unit detects me (provided the bug hasn't previously been triggered) the mission objective trigger fires and the team orders me to clear the buildings and they advance.

If the bug has occurred then the trigger doesn't fire and the mission comes to a halt, until the campaign is completely exited, and reloaded from the main menu.

Hope this helps, let me know if you would like the save file, and where I can send it to.

I'll also give this mission another shot tomorrow with no mods loaded and see if I can recreate the issue.

Update 7/4/2014:

Attempted to run the mission again today with no mods loaded. Same approach technique, slightly different behavior. Clear buildings was prompted, but mission halted after buildings were cleared with 3 out of 5 members of squad in court yard (one may have been lost, I'm afraid I'm not positive on that though), the other was south of the court yard, and I was still running around waiting for the mission to end.

Same triggering mechanisms though: sneak around back, attack unit in shack attached to stone building, circle back attack unit in building without being seen by either.

I also stand corrected I don't have save files (they don't seem to exist outside of memory?) I do have .rpt files if they'll help. I'm also willing to jump in and see if I can record a video.