Issue
CORS Policy Error for form submission occurring intermittently
Solution
Root Cause
If you have customized the embedded code, Marketo Support is not able to troubleshoot custom code.
Multiple embedded forms on a single page can cause the forms to not work incorrectly.
Multiple forms embedded with different domains may require your IT team to make sure resources are requested correctly from one domain to another.
Environment
Marketo form embedded on a non-Marketo webpage