On git when new Features are merged into Develop Branch , Source Control take Database Schema as Good and not the new changes on Develop. If like don't considerate last DDL TIme of an object to diff between new and old.

One example are Hot Fix merged on Develop branch, when a horfix was resolved and you are going to integrate changes in Develop Database, Source Control consider Develop Database as Good schema and not the new Hot Fix Change merged into Develop Branch. Generating Check In changes and not Get In Updates.