I just had a situation where I my companions on a Beastmaster character killed the boss of the final Quest Echo in The Age of Winter while I just left the game at the Respawn screen after dying. This ended up giving me the Blessing and resetting the timeline stability, like I had cleared the quest echo, but it did not give me progress towards the Quest for completing the Age of Winter Monolith. I would think I shouldn’t get progress there since I was dead, but even if I should have it doesn’t make sense for it to act as if the timeline quest echos where cleared but not give me progress in the overall quest.
The log file was too big to attach, but I took a look myself and don’t see anything related to this in there. I was playing on the Linux build, if that makes a difference.
EDIT: I just exited and re-entered the game and the quest for the timeline completed when I got near the entrance to that timeline. Still doesn’t feel like I should have gotten credit for it though, since I was dead when my companions killed it.