Hi,
Thanks for your feedback.
The default subfield value does not work with the cloneable group and under the group settings. But you can use the subfield setting to set the default value. Like this
[
'id' => 'block_cross_linking_cards',
'name' => 'Cards',
'type' => 'group',
'clone' => 'true',
'sort_clone' => true,
'collapsible' => true,
'default_state' => 'collapsed',
'group_title' => ['field' => 'block_cross_linking_cards_title'],
'add_button' => '+ Add Card',
'fields' => [
[
'id' => 'block_cross_linking_cards_style',
'name' => 'Card style',
'type' => 'select',
'options' => [
'card' => 'Card',
'image-background' => 'Image Background',
],
'std' => 'card' //here
],
],
],