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In the same document the authors in section 2.1 specifies the plaintext size to be between $0$ and $2^{39}-256$ bits = $2^{36}-32$ bytes = $2^{32}-2$ blocks of 16 bytes. That's the rationale behind the choice of the counter size. Given that requirement it will never overlap/wrap, which means you will never end up having repeating the "scrambling pattern" ...



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