I was patrolling on Mars in the Vex section of Freehold and ran into two invisible players (no usernames visible, either) who were somehow able to attack and kill my character. The game labeled the deaths as Killed by the Architect or Misadventure, but it was definitely the invisible players. A couple of times after respawning, my character also became invisible, and I also got the "searching for spawn location" message while trying to respawn as if I were in Crucible instead of PvE. I've never run into anything like this before; has anyone else? Could it be a hack, or just some kind of glitch?