I just tried to make a build with the Mesmer trait Disruptor’s Sustainment (Inspiration XIII, +1k Healing power on interrupt), but I’m not sure if the trait works.
If I interrupt an enemy (in pvp or pve) with the trait active I do not get any buff. While this might not be a bug in itself, it’s really hard to test whether the trait works or not otherwise. It’s also almost impossible to use the trait if you can not determine if the buff is active or not.