The Blue Sun Mod

[Shapecharge]

I've been playing this mod for some while now and enjoying it so far.
But I ran into a problem with the "backstabbing" mission:
After the car bomb situation and the ambush, I encountered a border guard whom I managed to bribe, but afterwards when I try to leave the area, the arrow representing the truck on the world map screen seem to disappear instead of following it's designated route.
Is this a bug or am I doing something wrong?

Edit:
I solved it by waiting a few hours on the mapscreen