This was a bit annoying when I ran into this: during the fight with the Flind and the gnolls, one of my characters was downed. That same turn, I killed the flind and combat exited. It immediately cut into the conversation with Rugan so I couldn't help the downed character, who then died while I was having a conversation.
My suggestion is to have downed characters auto-revive after combat ends if a companion is within range. Alternatively, don't make cut scenes/conversations trigger automatically like that. Make me talk with them if I want to talk.