Hello. I've spotted a classic underflow bug. And we all know what happened last time... I opened up the "list of reports" -> "city status" -> "resources" menu in a multiplayer game after my friend left (internet, I'm hosting) and I can see that one of my cities has 65536 crabs which is 2^16 so this is clearly an underflow. I reopened the save file with just me in the game and it is still happening. Save file attached. If the data is stored as part of the save and not recalculated then I couldn't tell you when it started occurring.