Output shortcode inside CF7

Hi,
I have a simple shortcode that add 4 link with icons !

I put in my functions.php this code

add_filter( 'wpcf7_form_elements', 'mycustom_wpcf7_form_elements' );

function mycustom_wpcf7_form_elements( $form ) {
	$form = do_shortcode( $form );

	return $form;
}

also this

add_filter( 'wpcf7_form_elements', 'do_shortcode' );

and the shortcode print my link but outside the form tag !!

what’s the problem ?

thanks