Lag in campaign map

[Blingerman]

Well it is the first time I am playing a faction over 20 years, so I don´t know if this is related to 0.81 or previous versions, but every turn when I have done a pair of orders, moved over the map, or read the news a terrible lag appears. I have a very good machine indeed I play the battles everything maxed in 1680X1050. When I clik the next turn button lag is gone till I do a pair of things when it returns again. It is normal? Can I change anything to have a smooth travel over the campaign map as I can do in other mods and MTW2?
Thanks in advance