Cast to array in setValue() instead

public/theme/skeleton/test.twig

@@ -32,7 +32,6 @@
 
         Escaped: <br>
         <div class="box text_markup_c">{{ record.text_markup|e }}</div><br>
-
     </p>
 
     <hr>

src/Controller/Backend/ContentEditController.php

@@ -235,7 +235,7 @@ class ContentEditController extends TwigAwareController
             $value = Json::findArray($value);
         }
 
-        $field->setValue((array) $value);
+        $field->setValue($value);
     }
 
     private function updateTaxonomy(Content $content, string $key, $taxonomy): void

src/DataFixtures/ContentFixtures.php

@@ -84,7 +84,7 @@ class ContentFixtures extends Fixture implements DependentFixtureInterface
                     $field->setName($name);
 
                     if (isset($preset[$name])) {
-                        $field->setValue((array) $preset[$name]);
+                        $field->setValue($preset[$name]);
                     } else {
                         $field->setValue($this->getValuesforFieldType($name, $fieldType));
                     }

src/Entity/Field.php

@@ -198,9 +198,9 @@ class Field implements Translatable
         return $value;
     }
 
-    public function setValue(array $value): self
+    public function setValue($value): self
     {
-        $this->value = $value;
+        $this->value = (array) $value;
 
         return $this;
     }

src/Entity/Field/MarkdownField.php

@@ -16,7 +16,8 @@ class MarkdownField extends Field implements Excerptable
     public function __toString(): string
     {
         $markdown = new Markdown();
+        $value = $this->getValue();
 
-        return $markdown->toHtml(implode(', ', $this->getValue()));
+        return $markdown->toHtml(reset($value));
     }
 }

src/Entity/Field/SlugField.php

@@ -14,9 +14,12 @@ use Tightenco\Collect\Support\Collection;
  */
 class SlugField extends Field
 {
-    public function setValue(array $value): parent
+    public function setValue($value): parent
     {
-        $value = Str::slug(reset($value));
+        if (is_array($value)) {
+            $value = reset($value);
+        }
+        $value = Str::slug($value);
         $this->value = [$value];
 
         return $this;