I have completed at least ten Korolov escort missions with no failures as well as the Charon story line, however the achievement has not triggered. I noticed that it has a 0% unlock rate in global achievements also, so something is probably broken somewhere... I can provide my save game if required.

george moromisato 20 Dec 2021:

Definitely looks like a bug. Will fix. Thank you!

george moromisato 3 Mar 2022:

Fixed on the server. Thank you!