Multisport activity loading into Athletica

Hi - Did a swimrun workout with a partner yesterday. Used the Garmin swimrun activity to track it, which fed into Athletica as multiple activities. No real issue with this but it dropped a leg of swimming. Strava has the same constraint with swimrun - breaks it into multiple activities - but it did pick up the missing swim leg. Just wondering how other ‘brick’-type workouts like this get handled by the system. I understand the system sees load as load, so not worried about not being credited.