Fixed bug with empty filter in search and then applying the defaults instead.

CHANGELOG.md

 # Version 1.73 (not yet released)
 
+* Fixed bug with empty filter in search and then applying the defaults instead.
 * Added filter: Contact has number of activities in period
 * Added filter: Most recent event date
 

Civi/DataProcessor/FilterHandler/AbstractFilterHandler.php

@@ -280,6 +280,7 @@ abstract class AbstractFilterHandler {
       $isFilterSet = $this->applyDateFilter($submittedValues);
     }
     elseif (isset($submittedValues['op'])) {
+      $this->resetFilter();
       switch ($submittedValues['op']) {
         case 'IN':
           if (isset($submittedValues['value']) && $submittedValues['value']) {