divine vessel bug

i used a divine vessel on a map i had previously completed, and it did not capture the soul of the boss despite me completing the map.

it works when i haven't completed a boss prior to using vessel so perhaps the bug lies there?

Same for me... I have only done it on Iceberg map so far. Same result two times and it was already completed when I tried with vessel.

Also a PoE1 item seems to happen alot