Helliquary - Warband Vitaath 1

If I look at the tree in Westmarch and check Vitaath difficulty 1 it’s shows that I have not earned the bonus Scoria from killing this raid boss with my Warband…
https://i.imgur.com/yPRRXMC.jpg

However, I recall having killed this boss with my warband. For confirmation, if I look at my Warband’s details, it shows that I’ve done all three levels of Lassal, all three levels of Vitaath, the first two levels of Gorgothra and the first difficulty of Gishtur/Beledwe, for a total of 9/15 bosses…
https://i.imgur.com/J7s6jV6.jpg

Also, if I view my Codex > Conquest > World section, it shows that the next boss I have to defeat with my warband is Gorgothra difficulty 3. This task only becomes available after completion of tasks for defeating Lassal 1, Lassal 2, Lassal 3, Vitaath 1, Vitaath 2, Vitaath 3 and Gorgothra 1 with a warband…
https://i.imgur.com/ah2JS47.jpg

There’s clearly a bug here somewhere, i.e. one of these two options…

  1. The display at the tree is wrong, i.e. I’ve earned the bonus Scoria but it’s not showing that I’ve done so, or
  2. I’ve completed the raid in a warband and the bonus Scoria was not awarded

Without reforming a warband raid and re-doing Vitaath 1, I can’t tell which.

–==[ EDIT ]==–

So, in order to investigate, tonight I formed a warband Vitaath 1 raid and killed her, as shown by obtaining an Eternal Legendary Crest Voucher…
https://i.imgur.com/59aAGmp.jpg

Upon returning to the tree in Westmarch, it now showed as having awarded the bonus Scoria for completing the raid with a warband…
https://i.imgur.com/FyYopZY.jpg

So, it would appear that the bug was within the granting of the bonus Scoria for a Warband raid of the boss, as my Warband listing / Codex both recognised that I’d already done this, but the tree did not.