Unable to delete Size Chart field

Hello! I’m currently unable to delete content in the Size Chart field, I can only update the content.

I tracked this bug down to class-printful-size-chart-tab.php on line 127:

//save
if (!empty($_POST['pf_size_chart'])) {
	update_post_meta($post_id, 'pf_size_chart', htmlspecialchars($_POST['pf_size_chart']));
}

This code is basically saying “Only update the field if there’s content”. If you delete the content, nothing is going to happen.

It should be:

//save
if (!empty($_POST['pf_size_chart'])) {
	update_post_meta($post_id, 'pf_size_chart', htmlspecialchars($_POST['pf_size_chart']));
} else {
	delete_post_meta($post_id, 'pf_size_chart');
}

This will delete the content if it’s empty. ??

Thank you!