When you meet Angry Cavebugbears in the Galley during a Bugbear run, they are not recognised as known monsters, it appears. Mafia does not show attack, defense or health, even though Manuel displays it. They appear to get added as extra monsters to Mafia (at least MissingManuel.ash sees them as monsters it doesn't have stats for if run during that mafia session).
Clearly not very important, as it's an old path.
Clearly not very important, as it's an old path.