Their subtitles can be seen anywhere in the central hub. This includes the war room below. I know Barda is big, but I didn't know her voice was too! lol
This is a general problem with iconics and the subtitle system. You can be a full street block away from an iconic and you'll still see their subtitles.
Not just the subs, you can hear them on the other side of the monitor womb like you were standing next to them. Also they repeat the same things over and over sometimes and Barda keeps speaking after she warps away.
Good catch. I'll take a look at this. It's likely the issue exists with Kalibak and Mantis in the Hall of Doom as well.
I tried to see this happen with them, but Mantis wasn't loading to talk. lol Barda on the other hand, couldn't stay away from Scott.
You know, I don't think Kalibak and Mantis like each other very much... Anyway, I got a fix in, hopefully it will make it to the test server with the next patch.