Game slows down in later years?

[chowderhead62]

I've noticed that the game slows down dramatically (in time compression) in later years. At the start of my campaign I could ramp up the time compression and the game would smooth zip around the Pacific. Now in mid 1944 it seems like the game stutters and chugs with time compression maxed out. Anyone know why this is or a fix for it?

thanks,
David