In my current save, the game keeps 'gifting' me entire fleets and individual ships out of nowhere.
Game
-Immense map
-Incredible
The terrans recently surrended to me. A few turns after I cleaned up their assets, the new ships started to appear. Many of these fleets exceed my logistics cap as well. Additionally, it seems the research is bugged as well. Techs showing as 2 turns are appearing in one.