I am having a similar problem with my Artificer Omicron Arkh. He has a green exclamation point over his head and when I talk to him he repeats dialogue from an earlier mission, as soon as the dialogue is complete he still has the green mark but then hitting X to talk to him no longer works until the next time I return to the bridge after a mission, then it’s rinse and repeat!

It’s preventing me from any other tech related actions such as salvaging or adding shards or codes to sockets.