I was playing the encore quest. I was at the point where the vex walls are up. Two vex bosses popped up and killed me. I spawned at the other side of the walls on the far end. There's no way for me to travel on my end to their end because I was blocked by walls. I can shoot them but I cannot collect the key to open the teleportation. I ended being stuck on one side and had to restart my mission. This isn't the first time I had this issue. I had this 4 times. It's a miserable glitch. Is there a work around this occurs? I cannot control where I respawn when I die.