I was playing a game where I took over an Empire city that was in the process of building a Death Shrine near the city. The City and territory turned Kingdom colors, but when the Death Shrine finished building, it stayed as a death shrine. Since I couldn't figure out how to destroy an improvement outside a city, I couldn't remove it or rebuild it as a life shrine. Is this supposed to happen? I thought Life/Death shards were supposed to switch back and forth depending on who owned them.