I did hear already about the ever lasting peace bug, however something similar just happened to me in a game: Had 2 research agreements bugging out.
After the 30 turns i didnt get a popup, no new tech, and they are listed under the completed deals tab. If i try to make a new treaty in the diplomacy leaderhead window, the research deal is greyed out, and the mouse over says that one is already in place.
The save was made before the patch which i downloaded with steam ~1 hour ago and includes "Deal expiration fixes".
Restarted steam twice since to make sure the patch does get applied, no clue though if it is since i got no message about it. Anyways, if i load the save now the error still occours, so either this bug isnt fixed yet, the fix is only for new games or the patch isnt applied yet.
After the 30 turns i didnt get a popup, no new tech, and they are listed under the completed deals tab. If i try to make a new treaty in the diplomacy leaderhead window, the research deal is greyed out, and the mouse over says that one is already in place.
The save was made before the patch which i downloaded with steam ~1 hour ago and includes "Deal expiration fixes".
Restarted steam twice since to make sure the patch does get applied, no clue though if it is since i got no message about it. Anyways, if i load the save now the error still occours, so either this bug isnt fixed yet, the fix is only for new games or the patch isnt applied yet.