Found an interesting bug the other day, and can not find any other reference to it.
Promoted a Commander to Privateer, spotted an opponents citizen transport, attacked it, won, captured it... but I now have a tiny ship that I can do absolutely nothing with (all options are grey), and the game is in a process loop that tells me I have to do something with it.
Seems there is something crucial missing here. Either the transport should be flagged as not convertible, or needs to be flagged to be upgraded (or scrapped for resources) once captured.
The other missing part of this equation: If I capture a transport or colonizer, I seem to get their personnel to use as my own, so what happened to the Citizen if I captured their ship? KIA? Undeclared hostage? Decided to abandon ship and walk home?