We were thrilled to see the addition of the "Add to Calendar" email button! However, as we've started testing it we've noticed that when we select "Event and sessions registered" in "What should be added to calendar?", users receive an entirely new calendar, not a calendar item/meeting invitation added to their existing calendar.

The function works well when we only select "Only the event" in "What should be added to calendar?" but we would like to be able to use either option. Are there any ways that we can fix this ourselves?
Thank you!