Safari freezes when using Passkey when devTools are opened

I see that on some sites (possibly many) the passkeys verification freezes when devtools are opening.

I tried to debug and see that it hangs in navigator.credentials.get.

STR:

Go to https://passkeys-demo.appspot.com/ Enter random username and click Next Enter password and click Next Create a Passkey. Sign out. Select USE ONE BUTTON SIGN-IN INSTEAD Open dev tools. Try to Sign in with passkey.

Expected result:

User successfully logged in - technically navigator.credentials.get returns credentials.

Actual Result:

navigator.credentials.get stucks in infinite loading and nothing happened - no any errors.

My assertion options looks like:

{
    "challenge": "K8WztCaAZM5-ST7r198F6UD4iLZ09IINHSiDJBgHHq4",
    "allowCredentials": [],
    "timeout": 60000,
    "userVerification": "preferred",
    "rpId": "passkeys-demo.appspot.com"
}

In source code on this demo site the code

  options.allowCredentials = []; <---- breakpoint hit here

  // Invoke WebAuthn get
  const cred = await navigator.credentials.get({
    publicKey: options,
    // Request a conditional UI
    mediation: conditional ? 'conditional' : 'optional'
  });

  const credential = {}; <---- breakpoint NOT hit here (after removing breakpoint above and after macOS touch ID is completed)