Hello, I know you all have had this been reported for a while, I've seen them talking about this for several months and seems to be something that has been a bug for almost as long as the Timeline itself has been a thing in game from the way it's talked about. However I came back to the game and have went through this mission 6 times, and there is something I noticed each and every time that should help with your investigation of the bug. You get the last cut scene showing Cayde's death and the finding of Uldren being resurrected as Crow. At the end of the cutscene you get a very faint glimpse of the Engram falling into place on the right side of the screen as it's all black and instead of going to the Mission Stats screen like at the end of a Strike or such activity you get automatically rerouted to the Orbit screen. So what you need to look at in the code is the code line for rerouting to screen, and since we don't get the old Mission Complete Stats screen like we see when Light Fades Away when all Guardians die in a Resurrection Restricted zone and instead get a completely new screen it is likely that the coding is still trying to reroute to the old Mission Complete Stats screen and having the 30 seconds timer before sending back to Orbit being automatically set to 0 seconds. This would explain why the game doesn't do the completion of the step 1 of that exotic Monte Carlo weapon and instead gets stuck in an Incomplete loop as the final step of "accept rewards in Mission Complete Stats screen" is no longer being met. What you need to do to fix this is cut the line of code from just after "play cutscene=Cayde's Death/Crow" and from that point add in code for "end cutscene=reroute player to location=Complete screen=Reward Engram given=step 1 complete transition unlock step 2=reroute player to location=Orbit after 30 second timer". Now yes that isn't code but would be the logic step by step sequence for it. As I said it seems to be trying to reroute to the completion screen but maybe it has the incorrect file tagged for that screen and trying to use the old file that is no longer used so getting that updated might fix it in itself. Hope you get this fixed, and glad I still have my old Monte Carlo weapon that I have in my vault from before I quit. This of course means it locks out new players from it unless they get it in a random engram, and unsure if further rewards in that Timeline Mission are able to be obtained from other means as well as I have no clue what they are since it won't update the step 1.