I don't know when this problem occurred, as it never used to be so - but in my latest battle, I have just witnessed 3 heavy cavalry units charge through my phalanx of Royal Hoplites/Citizen Hoplites (x5) who were defending a gatehouse. This has meant that the cavalry, unchallenged, have managed to get to my city capture zone to butcher my reserve troops, whilst my Hoplites are rendered useless at the gates. What has been broken that has resulted in cavalry just being able to storm through solid walls of men without any loss to speed??