No idea what you are talking about. I've just retried and I still can't complete the mission. The square goes blue but there is no movement in the progress bar at all.
They are aware of it as I got a reply from my bug report: I would suggest also updating the thread they mentioned if that is the one they are monitoring.
I had to level up to commander and get lieutenant commander engineer and use the eject warp plasma just to get past it following the advice from https://sto.gamepedia.com/Mission:_Afterlife A pain to do but it worked after trying that one group for 10-15 mins.
Can the content on the Arc launcher be updated more often. Even though I only installed it recently, it has an advert for the T6 khitomer alliance ship. I would very much like the ship but I've only started playing again recently and wasnt around when it was available. Please stop taunting me!!!!