Trying to complete this mission with my Klingon character, but it will not complete. Tried dropping it and going through the mission a couple of times.
Each time I return to drozana in the current time after completing all objectives, it then still wants me to go back in to the past. It keeps returning me to the part where the maintenance elevator stops and you crawl through the jefferies tube.
It will then let me carry on again but once I get to the end of the mission again, still will not let me hand it in and wants me to return to the past (maintenance elevator bit).
Hope that makes sense. If anybody knows how to get around this, please let me know.
I've encountered this bug myself before. As best as I can tell, it is happening because I return to the present time before the mission completes. If memory serves me correctly, you can hail your contact to collect the mission reward before returning to the present (i.e. once you've got the injection from Bones). If I'm correct in that memory, then you can avoid the bug by resolving the mission prior to returning.
Did this mission yesterday a couple of times to get the retro phasers and there is an issue as it seems.
Before getting through the jeffries tube you can (have to ...) interact with a panel. If you don't do this, you can just proceed with the mission and finish it actually. When having the final conversation with McCoy, you get the message that you can leave and have completed blablabla.
However you cannot get the reward and the confirmation in your log. I had to go back to Drozana's past. This time not via the console but via the cargo door besides it and redo the mission.
You have to pay attention to your mission log. I have seen these issues in other missions to; you forget one simple step, still can go on with the mission, but can never get the reward. Also, it is not always possible to go back on the map.