An item is always printed on the same page. If the description becomes too long, it will be moved entirely to the next page.
Therefore, it is advisable not to make the description too long. For a lengthy description, it can be split into different items, or you can add the content at the bottom of the quote in the note.
FYI: You can also add informative lines that do not contain amounts. Click next to the item on "Actions" > "Informative Line".