By default, the “All” option is active in Shuffle Filter.
To activate another filter at beginning, please add this code to Custom JS field in Content Views >> Settings page:
/* Shuffle Filter - set default filter */
window.sf_enable_trigger = true;
setTimeout(function() {
var $filter_bar = $('[id^="pt-cv-filter-bar-VIEWID"]');
$filter_bar.find('.pt-cv-filter-option').eq(1).trigger('click');
}, 2000);
Please replace VIEWID with ID of your View, and replace the number 1 with index number of the filter you want to activate. Here are indexes of filters:

Best regards,