The swamp, bog, and children reset every single time you load a save or refresh the game on Android. This includes any interactions with any characters in the swamp or bog. You can have the story arc for any swamp or bog character complete and saved and it will still be reset. This includes any children that came from interactions in the swamp or bog. Most characters encountered in the swamp or bog even though they are supposed to be camp only once you complete certain stuff they will still be encountered in the swamp. Any children that you produce with any character will also vanish once you reload or refresh the game. I know that urta, helia, kiah, ember, amily the Sylvia, the zombie girl and most other characters you can interact with forget about you especially if they are able to produce children. The explanation of the swamp, bog, many other locations reset every single time you load a game or refresh the game. You could have only just saved then reloaded and all progress is gone.