https://wccftech.com/battle-for-azeroth-hotfix-jaina-reverted/

Blizzard has reverted an unintentional Battle for Azeroth hotfix that increased the difficulty of the Jaina Proudmore encounter in the Battle of Dazar’alor Raid.

A new hotfix was rolled out the game’s live servers earlier today, and it seems that this new patch included a change to the Jaina encounter that wasn’t intended.