Both iOS18.6.2 and iOS26.2, Safari and Chrome.

I forgot two more steps to reproduce this issue. Modified steps as follows. Create a Shortcut to launch and access to https://passkeys-demo.appspot.com/ and place it to desktop on your ios device. Tap the shortcut to access the url register account and create passkey. logoff access to the url again using the shortcut. you can see the passkey dialog unlock device then the dialog disappears nothing happens reload the page proceed 5) to 6) nothing happens or success webauthn. When you reload the page, a password dialog may occasionally appear instead of the passkey dialog.

Thank you for youre comment. We were using Chrome app. iOS : 18.6.2 Chrome : 143.0.7499.92 Safari had same issue but it is difficult to repro. I cna share a video with you but I cannot upload video. Do you have any idea to share a video with you? thanks,