Hi @Miguel ,
Thanks for reaching out.
I understand you're experiencing a flash of the myurl.com page before the user is redirected to the secured page after clicking the button.
This might be due to the redirect URL is set to your website's root domain ie. myurl.com, which causes the initial unsecured page to load briefly before the authentication process completes and the user is redirected to the secured page.
To solve this issue, you could set the redirect URL to the specific path that you want the user to be redirected to after authentication. For example, if you want to redirect the user to "myurl.com/secure-page" after authentication, you can set the redirect URL to "myurl.com/secure-page" instead of "myurl.com".
Hope this will help.
Thanks,
Shweta