With the patch not applied (or reverted) Create a Topics based course with one section, course layout of one section per page and completion tracking turned on. Enrol yourself as a teacher on that course. Turn editing on. In the first section create a Book resource with one chapter, manual completion tracking on. Duplicate that Book activity to create another. In the first section create a label with the text 'Test' and manual completion tracking on. Turn editing off. Manually mark both book resources as complete. Navigate to the main course page. Observe that 'Topic 1' summary reports that there are two books and 'Progress' is 2 out of 2.  So 'logically' complete. Navigate to the 'Dashboard' containing the 'Course overview' block. Find the course in the list of courses (You may need to change the filter to 'All') and observe that the bar chart shows 66% complete.  Thus being logically different to the apparent 100% outcome in step 10. With the patch applied Create a Topics based course with one section, course layout of one section per page and completion tracking turned on. Enrol yourself as a teacher on that course. Turn editing on. In the first section create a Book resource with one chapter, manual completion tracking on. Duplicate that Book activity to create another. In the first section create a label with the text 'Test' and manual completion tracking on. Turn editing off. Manually mark both book resources as complete. Navigate to the main course page. Observe that 'Topic 1' summary reports that there are two books and one label and 'Progress' is 2 out of 3.  So 'logically' incomplete. Navigate to the 'Dashboard' containing the 'Course overview' block. Find the course in the list of courses (You may need to change the filter to 'All') and observe that the bar chart shows 66% complete.