Well, always when playing Castle Story in multiplayer mode, the host always comes out to advantage, because he can see from his opponent's crystal a line of light color (blue) indicating more or less the position and number of sentries of opponent's attack, and the player who is not a host can not see that line.
This "bug" leaves the host at an advantage.
the image below is a screenshot of the host of the match, where the line mentioned above appears, and the other player does not appear.
I sent the same message via email to your support.
Thank you for your attention.