Cross-Device Passkey Login Failing Frequently #117
Description
I am experiencing frequent failures when trying to log in using passkeys across devices (e.g., from my Android phone to my PC). Local passkey login on the same device works reliably (~75% success rate), but cross-device login success is very low (~14%), making passkeys effectively unusable in daily cross-device workflows.
Steps to reproduce:
- Create a passkey on Android using my Google account.
- Attempt to log in on a PC (Chrome) using the cross-device QR/confirmation flow.
- Confirm the login on the Android device when prompted.
- PC either times out, becomes unresponsive, or occasionally succeeds.
Environment details:
- Android device: Pixel 7, Android 14, latest Google Account passkey support
- PC: Linux, Chrome 134
- Google account: [your account, optional]
- Network: [home Wi-Fi, office network, etc.]
Observations:
- Even after setting the WebAuthn timeout to 120s, cross-device login still fails intermittently.
- Local passkey login on the same device works as expected.
- Failures appear to occur more often when confirmation from the mobile device is delayed.
Impact:
This issue significantly limits the usability of passkeys for users who regularly switch devices.
Could you please advise:
- Is this a known limitation or bug with cross-device passkey login?
- Are there recommended configuration steps for production environments to ensure cross-device reliability (session settings, cookies, load balancers, etc.)?
- Any guidance for debugging or improving success rates for cross-device logins?
Any guidance on configuration or best practices to improve cross-device reliability would be greatly appreciated.
Thank you for your support!