Just had two attempts to run the sieve in the last window. First: Three players load in, the rally flag does not load, the contact drifter prompt does not appear nor does the interact prompt to start the encounter. The other two players leave, two more join, but even as they load in nothing changes and I have to leave to orbit. Second: See attached picture. We kill the five exiles, charge the five pylons, kill five drones, but the fifth is not counted and no replacement spawns, you can tell by the lack of waypoints in the screenshot. This prevents us from moving the boss to the final phase and forces a quit. If the activity is this buggy, maybe it can just be run more often to prevent people from being locked out of their loot.