I've noticed in a recently ended invasion of the Minglers that few Minglers left some Cog building belonging to other Cog types (Bossbot, Lawbot, etc.). However, I've never seen a (The) Mingler entering these buildings, but only leaving.
The Mingler leaving the Bossbot Cog building.
The Mingler leaves the Lawbot Cog building.
Just a thing I've noticed.