Fix photo view losing the category when paginated

gistfile1.php

<?php

add_filter( 'tribe_events_pro_pre_get_posts', 'tribe_fix_photo_category_pagination' );
function tribe_fix_photo_category_pagination( $query ) {
	// check & set event category
	if ( isset( $_POST['tribe_event_category'] ) && $query->get( TribeEvents::TAXONOMY ) == '' ) {
		$query->set( TribeEvents::TAXONOMY, $_POST['tribe_event_category'] );
	}

	return $query;
}