After more testing, it turns out that the unused text is activated when Brown is near Joshua. His continuous barking is not a bug; it’s what the cutscene is referring to. Since Joshua will always run away, this never happens in-game.
seen from United Kingdom

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seen from Türkiye

seen from Türkiye

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seen from China

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seen from Türkiye

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seen from Türkiye
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seen from United States
After more testing, it turns out that the unused text is activated when Brown is near Joshua. His continuous barking is not a bug; it’s what the cutscene is referring to. Since Joshua will always run away, this never happens in-game.