Using Websiet X5 Pro 13. Initial tests of the email form on a micorsite (one page site) seemed to work OK. A couple of days later, I find that clicking Send on a completed email form simply blanks out the entire page. Clicking back restores the page, with the email data in place. This happens on all devices, using Windows 7 and XP. Email advanced settings are set to PHP email, as advised.

This is seriously frustrating ...