Regression fix for issue #125.

CHANGELOG.md

 # Version 1.66 (not yet reelased)
 
+* Regression fix for issue #125.
+
 # Version 1.65
 
 * Regression fix for issue #125 after refactoring for filter collections.

Civi/DataProcessor/FilterCollection/FilterCollection.php

@@ -189,6 +189,9 @@ class FilterCollection {
   }
 
   public function removeWhere(WhereClauseInterface $where) {
+    if ($this->data_processor && $this->whereClause) {
+      $this->data_processor->getDataFlow()->removeWhereClause($this->whereClause);
+    }
     if ($this->whereClause instanceof AndClause) {
       $this->whereClause->removeWhereClause($where);
     } elseif ($this->whereClause instanceof OrClause) {