This bug has existed since the release of West Weald.
One of the many threads raised on the subject since:
https://forums.elderscrollsonline.com/en/discussion/660138/viikor-brazen-hoof-boss-stuck-in-the-wall-in-silorn-unable-to-be-damaged-pc-na
The issue seems to be the mino's 'charge' attack. Clips through the collision and gets 'stuck'.
Given that the PD is probably pretty deserted these days popping in after today's maintenance would give you a decent chance of getting this done, just be mindful of your positioning when you dodge his charge attack or you might get it stuck in the collision again.
That or just trying different instances of the PD until you hit one where is not stuck.
This bug has existed since the release of West Weald.
One of the many threads raised on the subject since:
https://forums.elderscrollsonline.com/en/discussion/660138/viikor-brazen-hoof-boss-stuck-in-the-wall-in-silorn-unable-to-be-damaged-pc-na
The issue seems to be the mino's 'charge' attack. Clips through the collision and gets 'stuck'.
Given that the PD is probably pretty deserted these days popping in after today's maintenance would give you a decent chance of getting this done, just be mindful of your positioning when you dodge his charge attack or you might get it stuck in the collision again.
That or just trying different instances of the PD until you hit one where is not stuck.
Sounds like someone aggro'd and ended up kiting him to a bad spot. Did you try exiting and re-entering the dungeon?
(And yes, that would be a bug)