I’ve completed spire of the watcher twice. Both solo. My fireteam was closed. I didn’t glitch or any silly stuff. The Triumph is still locked. Let me explain. Ran it the first time over several days, using the check points. Must have fought the final boss a million times but finally beat him… no triumph. I was frustrated and annoyed but thought maybe I left the fireteam open early on and a friend joined and bailed. I just didn’t notice it. So I set off for the second run. This time double checking everything is closed. Again, this run is over two days using checkpoints. Again, no triumph! The only thing I can figure, since the triumph doesn’t say anything about a single play session, is while in the final boss room, BEFORE starting the encounter I was booted to space once or twice. Life, kids and all. Hope I’ve given enough info so you guys could maybe figure it out. Thanks!