The text "array" displays under the link field

I am not able to see the 'Array' text after following the steps to reproduce the bug. Could you share the configuration you used for field_redirect as well as maybe the field's configuration?

Tested on Drupal 10.2.0 and PHP 8.1.4

I have the same issue on Drupal 10, and I see an error message:
"Warning: Array to string conversion in Drupal\field_redirect\Service\UtilityService->formAlter() (line 325 of modules/contrib/field_redirect/src/Service/UtilityService.php)."

The line in question is trying to concatenate an object and an array:

$widget['uri']['#description'] = $message . $widget['uri']['#description'];

My guess is that there is some module making the #description into a render array.

Here is a DSM of what is in that variable for me:

array:2 [▼
  "#theme" => "item_list"
  "#items" => array:2 [▼
    0 => 
Drupal\Core\Field
\
FieldFilteredMarkup {#2576 ▼
      #string: "Redirect users to this URL when clicked. If this field is blank, they will remain on the site."
    }
    1 => 
Drupal\Core\StringTranslation
\
TranslatableMarkup {#2559 ▼
      #string: "
Start typing the title of a piece of content to select it. You can also enter an internal path such as %add-node or an external URL such as %url. Enter %front t
 ▶
"
      #arguments: array:5 [▶]
      #translatedMarkup: null
      #options: []
      #stringTranslation: 
Drupal\Core\StringTranslation
\
TranslationManager {#392 ▶}
    }
  ]
]

I wonder if adding this message to the beginning or end of the array would work, and if for some reason that value is not already an array, make it so:

$widget['uri']['#description']['#items'][] = $message;