Clint came to give me the recipe for the forge the day after I first went into the mines on my friend's game. I lost connection to the host server sometime later in that day (but my friend was still in) and was able to load back into the game on the same day. I still had all the fish I had caught that day but I didn't have the forge recipe anymore. I thought Clint would come by again the next morning, but he didn't so now I am forge-less, recipe-wise. Not a crisis, since the other farmers have the crafting recipe still, but I figured it's worth reporting.