Disappearing lobstermen commanders

I noted somewhere (this forum ?) someone else having this problem.

My squad stuns a lobsterman commander at a colony, returns to exit with specimen, and ends mission. The squad is credited with a live alien. However, the specimen is not onboard when the ship returns to its home base. (though, once it did but disappeared enroute to the research base).

I have had the specimen in a backpack, have carried it in hand, and have left it on the exit floor. Same result in each case. What gives ?

I have this fear the answer will be to upgrade to V. 2. Having invested much time in this game, I hope there is another answer.