[Plugin: Slideshow 2.2.19] Wrong slides displayed

Hello,

I do love Slideshow plug-in but I experience a weird effect: slides from other posts are displayed !
When the page is refreshed, the right slides may be displayed… or other ones again.

I call the slideshow Id with <?php do_action(‘slideshow_deploy’, ‘$id_photo’); ?>
$id_photo being a custom field.

Any idea ?
Thanks and happy new year !