Hi
I encountered a different bug in a PBEM game. When I an ally of myself offer a traety to each other at the same time and both accept. The treaty is killed an we're left with no treaty at all.
This is very annoying. I made friendship with my neighbor just after the game began. And we established one treaty after another until we reached Military Alliance. Then it happened. Wi beoth offered Partnership and both accepted one round later. Another turn passed and there was only the yellow word "none" in the treaty list.
As a result several of our ships (resupplying on the partners planet) were destroyed and of course we lost all minerals and research points from trade.
ZzZ