It is likely that your theme might be using a different template for these two pages. You can tell what template is being (for traditional themes) using a plugin named Show Current Template.

So, what theme are you using?
Are you using a page builder plugins?
Can you make a screenshot of form setup, just the Display Results settings tab (down to but not including the Pagination section)?

Ah, OK. Are you able to give me sight of that search.php template file? You could upload the file to a file sharing site, or post it here – please post any code inside code ticks (one before the code, one after)? On my UK Windows keyboard, the code tick key is next to the 1 key in the standard part of the keyboard. If you do this Google search and look at the images, they show various keyboards and where the key is located:

https://www.google.com/search?q=back+tick+code+key

OK, looking at that file, the only thing that can be done is to have a generic title, without the Search Terms in it. It can be quite complex to fetch what is being searched (whereas a theme search page has merely to repeat the string being searched, an s&f results page could have any combination of possible terms and terms types, and, to accurately output the title with terms, it would have to be inside the Ajax Container – the part of the page that has the actual results in – which is not coded in this actual search.php template file anyway).

so, assuming a generic title will suffice, copy that file to the child theme folder, and rename it. Maybe:

sandf-search.php

Edit it. Look for these lines (18-20):

<?php if ( siteorigin_page_setting( 'page_title' ) ) : ?>
	<h1 id="page-title"><?php printf( __( 'Search Results for: %s', 'vantage' ), '<span>' . get_search_query() . '</span>' ); ?></h1>
<?php endif; ?>

Replace those with this:

<h1 id="page-title">YOUR GENERIC PAGE TITLE HERE</h1>

And then, in the form, on the Display Results settings tab, change the file template being used to this one.