Multiplayer campaign with friend; why are our battles so slow (1/2 sped almost all the time)

[Aenima]

As the title says, my friend and I have been having really slow battles. Even when the game is sped up it usually slows right back down, and judging from the unit speed and the time it takes for a single second to pass on the clock, it's running at half-speed...and I'm talking almost all the time; even if we play the battle with the speed set to max forward for the whole thing we'll be lucky if it actually goes at even normal speed 10% of the time.

My question is, why? I'm playing on my PC, my friend on his laptop. As far as I can tell his battles run at normal speed when he's playing single player, yet for some reason it's slow as a snail when we play together. Any ideas?

[Aenima]

No one has any ideas? Has no one ever experienced this before?

[MrWaffleV2]

I have the same problem. Me and my friend have been playing coop campaigns together, and all the battles are really slow. We had the same problem in Rome 2. I haven't found a solution so far.