Theo definitely has some strong opinions about how the first game went.
I tested it out, and casting Torch on the save tile was indeed the culprit. While I like the idea of save points, they ultimately seem to be too fragile to keep around. I put out a quick fix patch that removes save points and instead asks the player if they would like to save at the start of every fourth turn. If anyone would like to switch to this patch, your save can be used with it.
I do want to keep mid chapter saving as the way the game is designed with a low unit count and a lot of Gameover units, not giving the option to save mid-battle could make the game frustrating for some.