Incorrect operation of the skill - Immunity to defiled blood

I have some big questions. Puddles of blood are tainted blood. I have megalomania with a tainted blood immunity stat. I'll tell you more. I put a tainted/enchanted tainted blood immunity stat on it. And you know what? Nothing happened, yeah.
Some people might say that this is a global parameter that doesn't work on bosses. But the wiki says otherwise. And you can get a puncture in your buttock in the wolf's castle and anywhere else. I mean, not just on bosses.