I was on Nessus Yesterday just outside failsafe's area when a public event started without any notice or rally flag ever appearing. It was the ether resupply public event. I was able to damage the servitor until the first health gate when the two shield servitors are supposed to spawn but only one spawned. I killed the one but the boss shield stayed active. The boss remained immune to all attacks for the next three or so minutes while the timer ran out and after the event ended I was able to pop a blade barrage in the two or three seconds before the servitor despawned and killed it. It's not a game-breaking bug but it was obnoxious and took me out of the experience enough to make me want to complain to bungie so here I am. please fix.