Leo and Capricorn differ in their social life. Leo enjoys being seen and taking part in an active social and family life. Capricorn usually prefers more reserve and gives time to those gatherings if they serve a goal Capricorn considers important.
What Leo experiences as a pleasant occasion to share may seem to Capricorn an interruption of their projects. The difference shows especially at home: Capricorn may see it as a refuge from outside noise, while Leo keeps its doors open to family and close friends.
Unexpected visits show the disagreement clearly. For one they are a joy; for the other, an invasion of the rest they were looking forward to.
The relationship needs other affinities to sustain it. If they share a home, they also need agreements about the common space: when they want to have visitors and when they need privacy. The home must make room for rest and for shared life.