Calendar course event icon is different from course icon

Install a new master site Login as admin. Navigate to the calendar. Check if under Events key sections icon of course events corresponds to the one in the attached screenshot. Create a new course. Go back to the calendar. Create a new course event (does not matter the course) with title: course. Change to Day view and check icons are consistent too. Change to Upcoming events and check it again. Now create a new site event. Check in the form there's a "Site" event type. Click on the created event and check "Site event" is shown there.