POE2 Trial of Sethmekas, Boon, Moment of Peace

I think the tool tip for the Moment of peace boon in the Trial of Sethmekas for POE2 need to be fixed, or the boon needs to be fixed. I just purchased this boon from a merchant right before the final boss to get my 4th ascendancy thinking the boss wouldnt be able to damage me, but that turned out to not be the case. the tool tip for the Boon didnt say anything about not working for bosses etc. Please look into this as it was obviously very frustrating/disappointing to think I got super lucky and then get hammered for it.