Modifed the storage of choice arrays to not just store the key (which currently is just the first letter of the key).

Author: Jean Fradet

src/EventSubscriber/ContentTypePersister.php

@@ -87,7 +87,7 @@ private function setContentFields(Content $content, Form $form, PostSubmitEvent
 
             if (is_array($value)) {
                 $value = implode(', ', array_map(function ($entry) {
-                    return $entry[0];
+                    return $entry;
                 }, $value));
             }
             $value = (string) $value;