Why was Attack on Titan episode 87 (Season 4 finale) delayed

The season 4 finale of Attack on Titan (episode 87, The Dawn of Humanity) is to be delayed in both Japan and internationally for online streaming, but why?

Why Isn't 'Attack on Titan' Episode 87 on Hulu? 'Attack on Titan

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Why was Attack on Titan episode 87 (Season 4 finale) delayed

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