A shared room is not ready when the next group arrives. First establish what happened and deal with the immediate need. Then ask whether it is a one-off event or part of a recurring pattern.
The iceberg is a teaching metaphor for widening the investigation: events, patterns, possible structures and assumptions. These are prompts, not four proven layers that determine every outcome.
Looking for a wider explanation does not make the event unimportant. A single serious incident can need action before a trend exists.