I noticed some odd behavior on my Prime derivative theme GenreatePress element.
The “Header Search” element that contains <div class="woo-search">[wcas-search-form]</div>
It is set to appear on “Entire Site” under Location, and there are no Exclude or Users defined.
For some reason, the Element does not appear on my search results page. Inspecting the code I can not even find the div container so it did not render the Element at all, so I do not think it is a search shortcode problem, but some oddity in the Element handling.