After completing the Juno AI mission, I let Juno free and took the 2 Ryujin guys back to Neon, and the mission ended, however the 2 guys stayed on the ship.
After completing the mission and going back to Neon for the 2 Ryujin guys (Operative Collins, and Operative Khambatta) to get off my ship, they ended up staying on board. I have done a number of other missions since completing this, and when I am in the ship you can see dialog happening of the two guys. I flew to a planet just now and they are standing next to me in the cockpit, cant talk to them other than 1 liner NPC chat you get from random NPCs, and so I have no idea what they are sticking around for other than this being a bug.
1.7.36
English (EN)
No
Unsure how to recreate it other than doing the Juno mission again from an old save, but I suspect it will be the same, unless this is a one off glitch?