The voice acting for Merlwyb ends in the middle of the cutscene for "The Gridania Envoy" after she says the line "But I jest. Please, do continue." The rest of this scene for "The Gridania Envoy" she remains unvoiced.
If this is working as intended, then it is inconsistent. A cutscene should be either voiced, or not voice, but never half and half. It makes it seems like something is broken.