I noticed it yesterday for the first time ever when playing Makedonia and laying siege to Sinope. The walls seemed to shoot through my siegetowers, hurting the troops inside. When assaulting with a 120 men unit, they went down to 85 as soon as they set foot on the walls. No gradual decline in manpower but a sharp jump. As if the game only registered the losses when the men were atop the wall, not while climbing within the siegetower.

Anyone else have this issue?