Maybe cached from a time before the block?
This would mean that content you created before your block could be still in the wild, but your new content not.
But also here, there would be no difference between admin blocks versus users blocking a domain.
In any case, it seems both of us have no solid information, and @Gargron for sure knows better, ar least than me. So as long as I don't have other information I trust that his infos are correct.
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