So I just opened up the game again, and sure enough, he didn't get any work done (Farming, Research or Building) in the last day. The game is clearly moving in time since he and Obi are getting older, more berries are on the bush and the log shows that Obi's health is improving, and crops are gorwing, but they are spoiling in the field.

I also noticed today that I didn't get an event. I also didn't get one yesterday, but I figured that might have been a random timing thing.

It really looks like that the game doesn't know that Guapi exists! (events only occurs if there is an adult in the village.) Guapi's health doesn't change, I also went back and checked the log (I saved it!) when the rest of the village died from starvation, and Guapi doesn't show up there until he started burying the other villagers.

It's possible that earlier in the game, he ate/drank something that changed his age, and the game is just waiting until he returns to that age, but I really don't remember.

ITMT, it is an interesting challenge for me to keep the game running for Obi's sake and hope for an event that will bring him a mate.