You misunderstand the issue. It has nothing to do with a user actually using the form or subscribing to a newsletter.
When you open a blog post, as the page loads you will see the feature image of the post then a white screen for a split second and it will return to the feature image/blog post.
The issue is that white screen for a split second that shows up when a page loads. The MailOptin plugin causes it. Once I disable it, that white screen is not present.
