https://news.blizzard.com/en-us/article/24295395/diablo-iv-patch-notes#3.2.3

・Fixed an issue where a character could use a Splinter of a Prime Evil before completing the Seasonal questline. This prevented that character from being able to complete the questline and access Prime Evil Powers.
Developer’s Note: This change prevents this bug from happening but does not reset quest progress on characters who are already bugged. To allow affected characters access to Prime Evil Powers, create a new character in the same partition (Normal/Hardcore and Normal/SSF) and complete the seasonal questline. This unlocks Prime Evil Powers for all characters in that partition.
・Fixed an issue where Tyrael’s spawn location after defeating Baal could make it difficult to pick up Baal's loot.
・Fixed an issue where the Sandstone Golem boss in the Horadric Library could fail to respawn if the player dies during the fight.
・Fixed an issue where the Countess in the Forgotten Tower could pass through the fog wall, preventing boss encounter progression.
・Fixed an issue where some affixes could not be re-rolled with the Horadric Cube. These include:
Impairment Reduction
Barrier Generation
+Healing
Critical Strike Damage
・Fixed an issue where not all monsters dropped Unbroken Bones during the Necromancer class mechanic quest Call of the Underworld.
・Various stability, performance, visual, and UI improvements.