Rook Creek Bridge mission not progressing

[Gunther2141]

I was testing ways to do the Rook Creek Bridge mission and after successfully defeating the tech the mission did not finish/progress. I tried different thing to get it to progress but nothing worked. I also can't get rid of it to restart it and my last save was a couple hours before hand (the autosave saved after I killed the tech). I thought maybe if I come back later it might fix but it didn't and I've made far to much progress to even consider restarting. Is there any way to fix this without losing progress?