the 'RHOA' star and Tyrone -- who's currently sentenced to home confinement -- have not spoken since a November 6 incident, when Sheree told Tyrone she was leaving NYC to go visit him in Philadelphia.

because Sheree told Tyrone she would have an 'RHOA' camera crew with her when she got to town.

We're told Sheree wanted him to come film a scene with her in a restaurant -- but, obviously, that would be a huge no-no for Tyrone due to his home confinement.

when Sheree returned to 'RHOA,' she made it clear she wanted her relationship with Tyrone to be a big storyline -- but that seems derailed now.