But the fact that this occurs so rarely really is very impressive
Any time there will be more than a couple of teams near each other is usually the case for "Zone" cameras. The team camera crew has a specific point where they peel away from the team, and the zone cameras take over. They also have a pecking order when teams get near each other, one crew will for a time shoot more than one team and the other crew becomes secondary and stays out of the shot. They have it choreographed so it is all smooth. Occasionally if they do step into a shot, you can hear the guys get into it! They can get testy! All of it is edited out, unless they need the shot to move the plot forward.