Not sure if it’s a bug or not but I got the Desensitization perk for the Animator and it’s only activated once despite being affected by debuffs over a hundred times. I saw some documentation that it should be 60%.
This perk only makes your Animatus resistant to debuffs, not immune to them. Resistant creatures are still affected by debuffs, but their effects are less severe. You can see a list of which debuffs change when a creature is resistant to them in your Codex.
I see. Thanks for clarifying!