Hello Mark,
thank you for so quick response and action. The reason, why Robert and me canot see the element you've added is because style="display: none;" really means it's not intended to be shown and even screen-readers skip such elements.

I see you're using Bootstrap. There should be a class made just for this purpose called sr-only. If it wouldn't be included in your Bootstrap version, such class definition is easy to find.
So please try to rewrite the styling to <hr class="sr-only">

Thank you very much.
Jan