The Zakdorn, Klaestron, and Caldonians have all recently joined the Federation. I end the turn and I get a new message that the Zakdorn have joined the Federation (again???).
I look at the map the Klaestron and Caldonians are no longer controllable and I have lost their territory, but the diplomatic screen still has them as Members. I right-click to bring up the interface and there is a momentary unpleasant audio screech.
I can attach a saved game if you wish to see this. Thanks. Great game so far! Such improvement over BOTF1!