After installing the latest update, I realized that I still had 10 extra hearts even though it was increased to 20 this update (Version 1.0.22).

Later found out that this config was first copied into save file when the world was generated rather than being an instance config, causing already existed worlds not being updated on food milestones.

Possible manual solution: Deleting the server file in serverconfig folder inside the save file and relaunching the client will copy the updated config into the save file, fixing the food milestone.