Issue #3344587: Required fields that are not visible are still being required

src/ConditionalFieldsFormHelper.php

@@ -686,15 +686,15 @@ class ConditionalFieldsFormHelper {
       $dependency_values = $context == 'view' ? $options['value'] : $options['value_form'];
 
       if ($options['condition'] === '!empty') {
-        $values = (isset($values[0]['value'])) ? $values[0]['value'] : $values;
+        $values = (isset($values[0]) && array_key_exists('value', $values[0])) ? $values[0]['value'] : $values;
         $values = ($values === '_none') ? '' : $values;
-        return (!empty($values)) ? TRUE : FALSE;
+        return !empty($values);
       }
 
       if ($options['condition'] === 'empty') {
-        $values = (isset($values[0]['value'])) ? $values[0]['value'] : $values;
+        $values = (isset($values[0]) && array_key_exists('value', $values[0])) ? $values[0]['value'] : $values;
         $values = ($values === '_none') ? '' : $values;
-        return (empty($values)) ? TRUE : FALSE;
+        return empty($values);
       }
 
       // The BooleanList widget provides an empty array as $dependency_values,