I am creating a form with "add more" functionality. Form builder retrieves values according to form built. keys are generated using uuid service. I also have to save them. So they are saved into form storage.
$form_state->get('links', $links) ... $form_state->get('links')
On the next ajax submission storage is empty?! Also I use a block configuration form. So it uses sub-forms. May be the problem is related with. This is related problem. How to prevent SubFormState storage leaking into parent?