Can someone explain civil wars in Emperor Edition to me?

I'm playing as Royal Scythia, have 90% influence, with 2 statesmen that do not belong to the royal family having 10%. I have had 2 civil wars so far, where 4-5 generals of the Royal Family would betray me. So basically I lose half of my armies and have to fight my formerly loyal generals from the Royal Family. Is this intended? All of my generals are from the Royal Family. Is there any way to avoid this besides having very low influence?