The check box under the More Options link in Course Settings for “Hide totals in student grades summary” is checked by default. This formerly just hid the scores and grades displayed in the Total column from students, but due to a product release change initiated by Instructure it now also causes the Assignment Group totals to be hidden. Prior to this change even if you left the grades and scores in the Total column hidden from students, they could still see a current percentage score for each Assignment Group, giving them an easy way to quickly determine the percentage that would be displayed in the Total column anyway.
If you would like to display Assignment Group and Total scores and grades to your students, you will need to uncheck the box. Directions for accessing it can be found at How do I hide totals in my students’ grade summaries? Just be aware you are going there to “unhide” rather than hide these totals. While you are there, be sure to take a look at the other choices made for your Canvas course under the More Options link. These default choices effect the behavior of discussions, announcements, and more, as well what grade information is displayed to students.