With the release of the HoT, HotM received some new Amulets with new stats not yet seen in spvp/tpvp. These stats are expertise(condition duration) and Concentration(boon duration) found on some of the new amulets. These specific stats regardless of which amulet that has them, literally do nothing.
I’ve held off on posting this as bugs happen, but it’s starting to reach a point where a fix is to be expected.
For fellow commenters, please do not state they work without taking two second to accurately test. I’ve had to politely inform some top tier players that they’re playing with dead stats who initially argued at first.