there was something in the patch notes a few months ago that said that this node is exempt to apoc, like his purify AAR just doesn't work against the node. it was not well received, but it's a small enough change that it doesn't matter too much, you just need to remember that he doesn't work.
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edit: found it
https://playcontestofchampions.com/news/v32-1-release-notes/
it was clarified so that it's an immunity rather than a purify