Hello, Grace Chen,
Thank you for reaching out to us.
To begin, we kindly ask you to perform the following test to determine whether the issue is related to the theme on your website. Please activate the default WooCommerce theme, Storefront, by navigating to Appearance > Themes, and then check how the form appears on the contact page.
If the issue persists regardless of the active theme, we recommend contacting the plugin author responsible for creating the form for further assistance.
Thank you for your cooperation in advance.
Best regards,
8Theme’s Team