Leviathan - rank 4 sector: Alien Drone, when it appears with Alien Hunter escort, you can pick it up.
Problem is that even if you already picked it up, it will still show you a notification message.
Notification message: This drone will leave the sector in X minutes.
How should it work?
After you collect an Alien Drone (15k random vouchers), you should no longer see such message, unless, if nobody collected such Drone and it is still in Open Space.