Been stuck on the same glitch for over a month. 1.3 did nothing to help. I'm in the Institute. Z1 tells me to kill the synths guarding an underground tunnel, but one of the guards doesn't spawn. Its marker is attached to a crate on a shelf in the room, but the synth never spawns. I can't complete the quest because the synths I'm supposed to be helping won't interact with me because i haven't killed all the guards. I tried loading a previous save but every time i reach that point of the mission, it glitches the same way. Please help, I'm at the end of my rope with this.