[W:0.6.532] Gameplay: Jawless prisoner unrecruitable (Intended?)

[King Kasai]

Mute prisoner cannot be converted.

An invading pirate had his jaw shot off, but survived. After he recovered, his only wounds were a shot off jaw and shot out eye. He can eat slowly, but cannot talk. In turn, he gets no + mood for 'Convinced by warden'. And the conversion event doesn't fire at all.

I tried two different wardens on him and another prisoner. Both wardens can convince the healthy prisoner, and both fire the event (without success). The jawless prisoner is incapable of caring and social, if that makes a difference.