I’ve also had this issue. The only workaround I found was to use HTML paragraph tags in the description. For example, for your description, you would write:
<p>This map shows...</p>
<p>This is meant to be a visual dictionary...</p>
<p>Note: This map takes longer to load...</p>
On a side note, it does not seem like the <ul> and <li> list tags work.
Update: I just checked your mods and they look like they have paragraph and line breaks in the description. Did you end up manually adding HTML tags, or did you do something else?