It's doesn't just make the final boss in Bloodroot forge harder, it makes it literally impossible. When the boss' HP is into single digits there's several invisible lava pools that will oneshot near enough anyone. This is when we were all pretty on top of quenching the lava pools ( we also had several attempts on hard mode but Christ I'm not that much of a sadist). It's these kind of bugs that make people want to leave ESO, this isn't an inconvenient bug, this is a game breaking bug, like being feared through the walls in Crypt of Heart. If if hotfixes can be applied to Geysers where it's a bit of a minor inconvenience, I feel like clipping through the wall, or animations not showing up a more severe and imperative bug to fix. Also vampires tend to dislike having their arses BBQ'd into a crispy bake. As someone who has played a large number of games in their life, this game has far, far too many bugs on a daily bases and a more proactive nature needs to be put into place to try and sort the long list out.
Consoles should receive the fix in their next patch. We had same issue on PC and they fixed it over a week ago.