When no description is chosen for submenu items the empty p-tag still remains in the html.
I noticed because I wanted to create a space between the submenu label and the description. For that I applied a margin-top to the description element. Problem is that the margin is applied even when no description exists. I sure can achieve this with custom CSS but maybe removing the unused p-tag is something you might want to consider.
As a temporary solution until this is fixed, it is possible to remove the p tag from the document flow using display: none; in a relative style targeting p:empty.