G&K Enhanced Mod (v1.10.2 Beta) (v 1)
Civ V Unofficial Patch v2.1.2 (GK) (v 1)
Seems that this happiness bug is also related to local happiness and there is still a refreshing delay which makes tracking hard for me.
Nevertheless I'm posting 4 pics about incorrect happiness during conquering a last Japan city.
1. Just before conquering a city.
2. Attacked city and puppet it.
3. Same turn, happiness changes.
4. One turn later.
Thalassicus, if you have a suggestion how I can help to track this issue then let me know (turning logging on, savegame, some other game situation with or without belief etc...)