I have bounced between KB+Mouse and Controller to see if there was a difference, and oddly enough have the same issue with both. Tried the others skills and seemingly all others work fine. Outside of Force's HP-PP skill. Which takes me hitting the activation twice to use.
Thus, when it decides to work, I end up wasting two charges due to the inaccuracy of will it work on a single push or not. Why I moved to being a Italian sauce name - aka Ra/Gu
I think it might be due to it taking HP and certain passives on some key subs treating it as possibly attack damage versus skill activation.
Mainly thinking Fo/Hu and Fo/Ra might be the reasons the skill is funky despite many others not taking HU and RA as subs.