Lesson of the Devoted bug

Used last night but didn't hold and wasn't on my buff list.

Edit: No, my buff window wasn't full just in case someone mentions this.

Did you receive a "blocked by" message in chat window? Did you try casting it multiple times and it kept failing?

No message, I did try casting multiple times though.

Did you have a potion running?

No potions.

If it didn't land on you then you either had something blocking it (such as a potion, even if it wasn't you that used one) or you were buff locked.

You'll have to post a video of you trying to cast it to prove otherwise.