AdmiralTorti I think we are talking about different things. 

You appear to be talking about tiles with yields for building cities on.

I am talking about the label for the tile type which appears above the mini-map which can be plains, hills, mountainside, mountain, ocean, forest, city, etc.

In this case when the monster razed the city its tiles remained city tiles instead of converting back to the original terrain tile.

This stops you from rebuilding on them or casting Birth of Summer spell as the game thinks they are still part of a city.   If you build an outpost on the tile and then raze the outpost the tile will revert back to a terrain tile and can be built on normally.

Nakisisa

"This stops you from rebuilding on them or casting Birth of Summer spell as the game thinks they are still part of a city.   If you build an outpost on the tile and then raze the outpost the tile will revert back to a terrain tile and can be built on normally"

Jesus at least this is a work around that lets me play. I was seriously getting annoyed at losing a city and thinking it was permanently gone.

Yes, this is a bad bug that needs to be addressed IMO.