diff --cc core/modules/views/src/Form/ViewsExposedForm.php
index bd6a9edd93,50eb634674..0000000000
--- a/core/modules/views/src/Form/ViewsExposedForm.php
+++ b/core/modules/views/src/Form/ViewsExposedForm.php
@@@ -144,11 -144,22 +144,25 @@@ class ViewsExposedForm extends FormBas
  
      $form['#action'] = $form_action;
      $form['#theme'] = $view->buildThemeFunctions('views_exposed_form');
-     $form['#id'] = Html::cleanCssIdentifier('views_exposed_form-' . $view->storage->id() . '-' . $display['id']);
+ 
+     // There is no way to determine the relation between a particular view
+     // and the corresponding exposed form, because the form can be built
+     // outside of the view processing pipeline, e.g. as a exposed form block.
+ 
+     // If a view has the dom ID already set, rely on it.
+     if (!empty($view->dom_id)) {
+       $form['#attributes']['data-drupal-target-view'] = $view->dom_id;
+     }
+     // Otherwise, rely on the view ID + display ID combination, assuming that
+     // multiple exposed form blocks will be controlling the very same views.
+     else {
+       $form['#attributes']['data-drupal-target-view'] = $view->storage->id() . '-' . $display['id'];
+     }
+     $form['#id'] = Html::getUniqueId(Html::cleanCssIdentifier('views_exposed_form-' . $view->storage->id() . '-' . $display['id']));
+ 
 +    // Labels are built too late for inline form errors to work, resulting
 +    // in duplicated messages.
 +    $form['#disable_inline_form_errors'] = TRUE;
- 
      /** @var \Drupal\views\Plugin\views\exposed_form\ExposedFormPluginInterface $exposed_form_plugin */
      $exposed_form_plugin = $view->display_handler->getPlugin('exposed_form');
      $exposed_form_plugin->exposedFormAlter($form, $form_state);