The Governments of Canada and the United States have issued advisories against travel to Haiti:
https://travel.state.gov/content/travel/en/traveladvisories/traveladvisories/haiti-travel-advisory.html
https://travel.gc.ca/destinations/haiti
What does RCI normally do in this case? I can't imagine they'd go anyway. Do they do an extra day at sea or is there somewhere else they'd go?
While Labadee is on Haiti, it's not part of it, really...the entire area is leased and private...sort of like Guantanamo Bay in Cuba! Unless there is unrest nearby, you'll go as planned.