Curious if this could be related. The Envoy Charter for the Maruuk Centaur at the Forbidden Reach zone 10.0.7 is locked. Myself and many others simply cannot select the Maruuk to gain the daily bonus rep buff. And that NPC is the only one who appears as Yellow (Neutral) not Green (Friendly or above) even though my Maruuk Rep would be considered “above Friendly” equivalent.
Not exactly the same problem as yours but perhaps related in a faction reputation being locked somehow.