Issue #2900911 by scott_euser, Sam152, Lendude:...

Issue #2900911 by scott_euser, Sam152, Lendude: \Drupal\workflows\Form\WorkflowTransitionAddForm::form sets a default value for radios as an empty array

core/modules/workflows/src/Form/WorkflowTransitionAddForm.php

@@ -89,7 +89,6 @@ public function form(array $form, FormStateInterface $form_state) {
       '#type' => 'radios',
       '#title' => $this->t('To'),
       '#required' => TRUE,
-      '#default_value' => [],
       '#options' => $states,
     ];
 

core/modules/workflows/tests/src/Functional/WorkflowUiTest.php

@@ -137,6 +137,8 @@ public function testWorkflowCreation() {
     $this->assertTrue($workflow->getTypePlugin()->getState('draft')->canTransitionTo('published'), 'Can transition from draft to published');
 
     $this->clickLink('Add a new transition');
+    $this->assertCount(2, $this->cssSelect('input[name="to"][type="radio"]'));
+    $this->assertCount(0, $this->cssSelect('input[name="to"][checked="checked"][type="radio"]'));
     $this->submitForm(['id' => 'create_new_draft', 'label' => 'Create new draft', 'from[draft]' => 'draft', 'to' => 'draft'], 'Save');
     $this->assertSession()->pageTextContains('Created Create new draft transition.');
     $workflow = $workflow_storage->loadUnchanged('test');