Blast the Protective Barrier Achievement

I just did a quick game and a practice vs AI game on the Frozen Airfield. I was told it was a guard rail you had to destroy.

I destroyed EVERY guard rail on the map and didn't get this achievement. No idea what it's suppose to mean. Also I've emoted on the throne during the throne room mission multiple times and haven't gotten that one either. Gotta assume these achievements aren't always registering.

It's ONLY the two achievements during the hold the point mission so I have to assume they are linked. Just posting this to let people know it might be busted or if they have seen it register by all means let me know.