Can’t see the opponent’s moves in multiplayer?

I have a question. When playing in multiplayer, during the opponent's turn, the screen constantly turns black. Even if they are moving on territories I've already explored, the screen still turns black during their turn...((( This doesn't happen in the campaign – during their turn, I can see them moving. Does anyone know if there's a way to fix this issue in multiplayer? I'm playing multiplayer with friends on separate computers.