In a Multiplayer game as well as in a Singleplayer game during the last 2 weeks from know a bug accured multiple times.
When i attack an enemy island and the moral goes down so that the island population surrenders you can chose to overtake the island or just take all the seats.
However when i clicked overtake/conquer it would not do so instead i got all the seats.
It was not possible for me to conquer an island. What fixed the issues was saving/restarten/and loading the file.
This is very wired and time consuming and i hope this gets addressed.