I ran Whisper of Jormag post reset last night (around 11PM eastern) and although we beat it, the daily for Bjora did not update. I am going to assume it is because we entered through EotN rather than through Bjora.
It’s technically not a Bjora Daily.
The ‘Daily Legendary Hunter’ daily specifically references the Raven Sanctum which the Whispers boss is not a part of.
Shows as a Bjora Daily for me. (For the next 10 minutes.)