Difficult to draw brooks and road

[Alfiere]

The last time i have difficult draw brooks and road on map.
Sometime remain and often vanish after draw (especially brooks , for roads is much better) .
I am wrong with something ?
Perhaps the problem happen when i use satellite map larger than the default map of the campaign of 30 km?
Sorry , now i think that this is the cause.

[Montecuccoli]

Roads and brooks are like "vectors they go from a point A to a point B trying to trace a coherent direction especially to the table edge.

Maybe you made some mistake with the mouse and the road or brook just disappear for that (sometimes i make some mistake for my bad "twists" with the mouse)