What potential issue or error could arise from the code snippet related to arrays in a form?

The potential issue that could arise from the code snippet related to arrays in a form is that the form input names are not being properly indexed when submitting multiple values for the same field. To solve this issue, each input field should be named as an array by including "[]" at the end of the field name. This way, PHP will automatically create an array with all the submitted values for that field.

<form method="post">
  <input type="text" name="names[]" value="John">
  <input type="text" name="names[]" value="Jane">
  <input type="text" name="names[]" value="Alice">
  <input type="submit" value="Submit">
</form>
```

In the PHP code handling the form submission, you can access the submitted values as an array:

```php
<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
  $names = $_POST['names'];
  
  foreach ($names as $name) {
    echo $name . "<br>";
  }
}
?>