Bug #2020635055 Omen of Amelioration did not trigger while active

Got oneshoted by the boss and lost 10% XP, before the fight I was 19% with 4 omens, after the death down to 9% with omen of Amelioration active.

Screenshot taken right after the death and reviving at checkpoint.
No other omens active (I know only one can be at a time)