core/modules/editor/editor.module                     | 4 ++++
 core/modules/editor/src/Tests/EditorFileUsageTest.php | 1 +
 2 files changed, 5 insertions(+)

diff --git a/core/modules/editor/editor.module b/core/modules/editor/editor.module
index a2c3219..b85fa85 100644
--- a/core/modules/editor/editor.module
+++ b/core/modules/editor/editor.module
@@ -466,6 +466,10 @@ function _editor_get_file_uuids_by_field(EntityInterface $entity) {
   foreach ($formatted_text_fields as $formatted_text_field) {
     $text = '';
     $field_items = $entity->get($formatted_text_field);
+    debug(count($field_items));
+    if (count($field_items) === 1) {
+      debug(debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 10));
+    }
     foreach ($field_items as $field_item) {
       $text .= $field_item->value;
     }
diff --git a/core/modules/editor/src/Tests/EditorFileUsageTest.php b/core/modules/editor/src/Tests/EditorFileUsageTest.php
index 9cc6a8b..4981433 100644
--- a/core/modules/editor/src/Tests/EditorFileUsageTest.php
+++ b/core/modules/editor/src/Tests/EditorFileUsageTest.php
@@ -133,6 +133,7 @@ public function testEditorEntityHooks() {
     foreach ($image_entities as $image_entity) {
       $this->assertIdentical(array('editor' => array('node' => array(1 => '2'))), $file_usage->listUsage($image_entity), 'The image has 2 usages.');
     }
+    return;
 
     // Test editor_entity_update(): increment again by creating a new revision:
     // read the data- attributes to the body field.