Had this two times now during seperate Chaos Wastes Citadel runs with WARRIOR PRIEST.
I got the Boon, and even if I was way above 75% Health, the icon never showed up, and I never got the typical friendly fire voicelines that go along with it.
WARRIOR PRIEST also had a Problem with exploding Barrels during the event on Foetid Gorge (only had that once), where you have to put the 3 Barrels in place. Everytime I picked one up it immidetaly light up as if I hit it.
Very annoying, did not matter which Weapon I had out, even went down inbetween, still same Problem.
So just played as FootKnight and Warrior Priest was the host.
Got Lady of the Lake boon, but again the Icon did not show, even when I was at 100% health, and it felt like the effect wasn´t there too.
Maybe that boon interacts badly with something from Warrior Priest?