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Censorship of the Taiwanese flag by Apple on the iPhone for users in China manifested itself as a crash whenever the Taiwan flag emoji was used[1].

[1] https://www.wired.com/story/apple-china-censorship-bug-iphon...

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> But Wardle found that in some edge cases, a bug in the Taiwan-censorship code meant that instead of treating the Taiwan emoji as missing from the phone's library, it instead considered it an invalid input. That caused phones to crash altogether, resulting in what hackers call a denial-of-service attack that would let anyone crash a vulnerable device on command.

Which was also a bug—the conditions of which's existence are manifestly political (which I have zero desire/intent to defend here), but nonetheless an Apple-side bug that was patched eventually

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