I recently added passkeys to a member login page, and LINE's in-app browser gave me one of the sneakiest bugs I've dealt with in a while. The passkey button showed up. Tapping it did nothing.

Source: [Dev.to](https://dev.to/sp0033212000/passkeys-in-in-app-browsers-the-api-is-there-but-it-wont-work-3m9a)

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