Editing issue

Good day folks, need some help here. Creating a new blog post, haven’t published yet. But I have an issue that when I complete a paragraph and click enter twice to create spacing, in the editing it looks fine. But, if I preview it, it shows as a continuation of the same paragraph all the way through.

For example:
I would like my paragraph to end like this.

So when I begin the new one it shows this way.

______________________________________________________

The way it appears now seems like a complete writers nightmare.
If this line would be the new paragraph I was beginning, this is the way it would appear on the preview.

In the editing, it shows correct, but not in the preview.

Please help.