I just had what seems to be a related issue. After rescuing Halsin at the Shattered Sanctum, he died in a combat. This triggered all of the Halsin related quests (and their linked plot development scenes) to react to his death. I was able to use a revivify on Halsin to bring him back. After defeating the goblin leaders and returning to Silvanus' Grove, Halsin instructs the party to seek reward with Rath. However, Rath is too busy mourning Halsin's death.
IMO the game should either don't allow Halsin to be revivified or set a flag after Halsin's death in the related quests to trigger upon Halsin's resurrection and match the plot development.
