If you jump to the unity while Vasco is your active companion, he will follow you in. No follower is supposed to do this.
This is because the sq_playershipscript will specifically teleport Vasco to you when you exit your ship, if he is your follower, and if you are not currently in space. Since the unity is not a space cell, it's not considered by that condition.
1.13.61.0
English (EN)
Yes
Have Vasco as your current follower. Build the armillary and jump to the unity. Vasco will be right behind you.