In the same patch notes, you say:

Rotos the Lost Groom

[Skill 2 – Vitality Plunder]

- Effect added: Now decreases the MAX HP of Bosses by 30% of the damage inflicted. 

AND

• Fixed a bug allowing Champions to decrease the Demon Lord’s MAX HP.
• We’ve updated the skill descriptions for the Demon Lord and all of the Hydra Heads (including Exposed Necks) to clarify that they cannot have their MAX HP reduced by skills or Artifact Sets that have that effect. 

So which is it? Can Rotos now reduce max HP of bosses? Or are bosses now even more immune to MAX hp decreasing effects?