Submitted an in-game ticket about this (though I forgot to make a note of the ticket #). Reporting here with additional information and because I forgot that the game just takes a screenshot of right then and there rather than letting me select a screenshot to submit. Additional screenshots below.
Platform:
PC - NA - Steam
Activity:
Solo run of Darkshade Caverns I on vet without dying - first time with this character.
Expectation:
To receive [Darkshade Caverns I Conqueror] and [Darkshade Caverns I Survivor] achievements.
Result:
Received [Darkshade Caverns I Survivor] but was not given [Darkshade Caverns I Conqueror]. The Conqueror achievement states that I did not defeat the Hive Lord when in fact I did. Furthermore, the Survivor achievement also requires defeating the Hive Lord. Both should have been awarded at the same time.
Affect on gameplay:
Will require at least one more run of the dungeon.
Screenshots:
Conqueror achievement
Survivor achievement
Hive Lord location showing that the boss is no longer present due to having been slain and cleared out.
FYI - I am not opposed to running the dungeon again. But this is technically an issue that should be addressed. Just because running the dungeon again "solves" the issue does not mean that the problem should not be investigated and corrected if possible.
PC-NA / PC-EU
ID
@IsharaMeradin
Characters NA
Verin Jenet Eshava - Dark Elf Warden (main)
Nerissa Valin - Imperial Necromancer (secondary)
Lugsa-Lota-Stuph - Argonian Sorcerer
Leanne Martin - Breton Templar
Latash Gra-Ushaba - Orc Dragonknight
Ishara Merádin - Redguard Nightblade
Arylina Loreal - High Elf Sorcerer
Sasha al'Therin - Nord Necromancer
Paula Roseróbloom - Wood Elf Warden
Ja'Linga - Khajiit Arcanist
Characters EU
Shallan Veil - Wood Elf Warden
ID
@IsharaMeradin-Epic
Characters NA
Ja'Sassy-Daro - Khajiit Nightblade