Issue #3449100: Not possible to disable all entity types or bundles in settings form

field_inheritance.module

@@ -147,14 +147,14 @@ function field_inheritance_form_alter(&$form, FormStateInterface $form_state, $f
       $included_entities = $config->get('included_entities');
       $included_bundles = $config->get('included_bundles');
 
-      if (!empty($included_entities)) {
+      if ($included_entities !== NULL) {
         $included_entities = explode(',', $included_entities);
         if (array_search($entity_type, $included_entities) === FALSE) {
           return;
         }
       }
 
-      if (!empty($included_bundles)) {
+      if ($included_bundles !== NULL) {
         $included_bundles = explode(',', $included_bundles);
         if (array_search($entity_type . ':' . $bundle, $included_bundles) === FALSE) {
           return;