I just finished Pit of Heresy solo about 10 minutes ago. I didn't get the triumph and I looked around and apparently you have to finish it in one go, unlike Shattered Throne. I just want bungie to clarify if this was an intentional part of Pit of Heresy solo or if it was a bug. It honestly feels wrong having checkpoints for a dungeon if you're just going to punish players for using them. Providing players with no way to restock on rally banners in the middle of a dungeon and forcing them to restart is fine, but you have to let them know that's the way it's going to be upfront instead of them spending several hours (for me it was around 4) trying to complete a dungeon just for them to be kicked in the teeth right at the end.