I looked at this because if it was about the pvp trink not showing or being usable when switching to pvp build I was going to agree.
There seems to be something wrong with trinket interaction in general. I've come across an issue with stats not passing through to the character from trinkets placed in utility belt slots and PVP trinkets being grayed out in Utility belt slots. I posted more info in a Utility belt bug post :: https://forums.station.sony.com/dcuo/index.php?threads/utility-belt-attachments.223758/
