I have Steam GOTY version.

When i have to choose who 'll go, if i try to send companion he 'll accept, but don't do anything - just stand in place. If pushed into airlock it can be closed, but he 'll stand still until explosion.

If i do this myself after cutscene i wake up in citadel, but if i talk to companion he still talks that this is farewell, and if i go to purifyer again i'll be locked there without possibility to exit.

And now the question: WTF?