[LE] Disappearing Soldiers during Battle of Whiterun and other Sieges`

[Deleted56253002User]

Is there a way to prevent NPCs from being disabled during Civil War quest siege battles like The Battle of Whiterun, Solitude, Windhelm, etc. along with other minor sieges that occur in OCW? I'm trying to add soldiers that march into battle but as soon as the first wave from the quests spawn, they are disabled and disappear.