Navigate to the More tab on the main menu. Open Grades item. Navigate into a course and then into an activity. Clicking on the activity name will open the activity itself in a phantom tab. You will notice it's a phantom tab because none of the bottom tabs isn't selected. Click again on the more tab button and check you are again in the page on step 3. Only on Android: Repeat step 4. Now use the hardware back button to go to the more tab. (you will go first to the course of the activity) use back button again and check you are on step 3 in the more tab.