Hi. I've been thinking about this for a long time now, but now I got the solution.
When used on mobile, the filters in search page are hidden. If you click show filters they apear but the text remains show filters.
In order to change show filters to hide filters you must change in
oc-content/themes/bender/search.php
<div class="actions">
<a href="#" data-bclass-toggle="display-filters" class="resp-toogle show-filters-btn"><?php _e('Show filters','bender'); ?></a>
into this
<div class="actions">
<a href="#" data-bclass-toggle="display-filters" class="resp-toogle show-filters-btn"
id="filters_btn" onclick='var str = document.getElementById("filters_btn").innerHTML;
if(str.indexOf("Show")>=0)
var txt = str.replace("Show","Hide");
else txt = str.replace("Hide","Show");
document.getElementById("filters_btn").innerHTML = txt;' >Show filters</a>
NOTE. After an Update this modification must be redone.