User API data returns boolean for "user_title" instead of string

[Painbaker]

Affected version

2.2.13

\XF\Entity\User::setupApiResultData:

$result->user_title = $this->custom_title !== '' ?: $this->app()->templater()->getDefaultUserTitleForUser($this);

Result:

{
  "user": {
    ...
    "user_title": true,
    ...
   }
}