Issue #3273953 by Dom.: The filter doesn't remove   for the "Transform...

Issue #3273953 by Dom.: The filter doesn't remove   for the "Transform all &nbps; with standard spaces"

src/Plugin/Filter/NbspFilter.php

@@ -56,7 +56,7 @@ class NbspFilter extends FilterBase {
 
     // Replace all   with standard spaces.
     if ($this->settings['clean_all']) {
-      $text = preg_replace('/([^>]) /ui', '$1 ', $text);
+       $text = str_replace("\xc2\xa0", ' ', $text);
     }
 
     // Replace spaces before configured characters with  .