So I'm going through the War of Light Part II missions and doing the Star Sapphire Embargo mission where you have to collect crystals for Star Labs and then escort an engineer to the teleporters and defend him while he disables them. I get him to the teleporters and he just sits there. He does absolutely nothing except run through his lines. I'll move around and he doesn't follow. It's like he's trying to do what he's supposed to do and is stuck but nothing is getting done. He is just locked in place talking. No sapphires spawn to attack either. After a little bit he'll start moving again and the teleporter disappears but the mission does not progress. One time he even got up to the teleporter, looked like he might even proceed with disabling it but instead decided to do what can only be described as a spastic seizure dance. I half expected him to explode and the teleporter to be perfectly fine. I can't even be certain I'm at the right object for him to work on though since there is no marker on the map or on the teleporter itself, it is just a giant platform with the Star Sapphire symbol and things disappear off of it so I'm pretty sure that's the teleporter. It's a safe bet but who knows. It could be the garbage disposal. I'm on the PS4 and have reset the game and my system thinking that maybe I was just playing too long and it needed a refresh but it does the same thing.