Project Config is a powerful tool for managing the schema of a Craft application.
However, as with any text stored in version control, it can and will cause merge conflicts when multiple team members make changes to the same system settings.
These problems are exacerbated by Craft's strategy of rebuilding the entire config/project
directory whenever a change is made. Of course, this helps keep the files and properties organized and up-to-date—but it can also squash changes under certain circumstances.