As of 1.20.70.21, spiders and cave spiders no longer become hostile when attacked by a player or another mob, and do not flee from armadillos. They still become hostile towards players when in darkness, but their responses to other mobs are not present under any circumstance, as far as I can tell.
Speculation: this is probably related to the change made to their AI preventing them from retaliating against breezes' wind charges.
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