Aha, there's 2 ways it can happen. I knew I needed a different message...
in the first case, when you get the spell/icon, you pick them up and the village goes away.
in the second case, you can get this result from a Visit. In this case the village stays, but behind the scenes, the Support value drops back to 1 (so you don't get such good results on average for a while). I wasn't too sure if this was a Good Option, I wanted to try it out. The idea is, everyone who likes you is leaving, but the village is carrying on.
Thing is I just played a game and found this option too often. I had a plan for a top-level random set of good results - this settler spawn, a treasure map, a better unit, etc.
Like everything at this stage, I'll take feedback and amend the general mod (or put something in the forthcoming options file).