Nemesis Defector died in battle before he was freed

[Uun]

In "Bring in Nemesis Defector" from Dark Watcher, Captain Sherman fell in battle (and the mission failed) before he was freed. I was still fighting the Fake Nemesis and Warhulk holding him hostage and had not yet been instructed to lead him out. Granted this mission fails 75% of the time, but it's usually while leading him out and the ambush hits. Hostage shouldn't be vulnerable until he is freed.