Numerous times i've ran group content (trials and dungeons) as my nightblade healer (yes they exist), i've noticed that i am not getting the buff that lets my damage heal others when i use funnel health. sometimes i have to spam it just to get the buff to appear (in the last trial i ran, i had to use sometimes up to 6 times before getting the buff). after testing in solo overworld content, it seems to work just fine and the issue only happens when im in group content, most often in trials.