Well someone has already marked this as cannot reproduce but I would instead ask for more details.
In r10998 I supposedly fixed a bug so that mafia would again automatically equip the blackbird familiar before the map was used and then restore the previous familiar afterwards. However I can construct possible errors with that logic that might cause familiars to be unequipped.
For starters what is the value of preBlackbirdFamiliar? It should be blank except for few moments that the map is being used.