Scouting suddenly non working
 

In a Faerun map, my scouts have stopped to report about enemy forces and provincial defence in the province they're in.

Why?

Is there perhaps a problem if the map has too many units inside (with Ermor and Pangea CW massing tons of troops) it is possible that the server has troubles?

I remember time ago when the game was at his firsts patches that games crashed when there were too many units in the game.