stock level not working in VM 4.2.4

[EIF]

I just update from VM 3 to VM 4.2.4, using J4.4 and PHP 8.1

On the product sublayout page the stock level icon doesn't work good anymore. It always shows a green bar, indicatint that it is in stock. But the product isn't in stock.
It concerns the folowing code:

Code Select Expand

<?php echo shopFunctionsF::renderVmSubLayout('rating',array('showRating'=>$showRating, 'product'=>$product));
if ( VmConfig::get ('display_stock', 1)) { ?>
<span class="vmicon vm2-<?php echo $product->stock->stock_level ?>" title="<?php echo $product->stock->stock_tip ?>"></span>
<?php }
echo shopFunctionsF::renderVmSubLayout('stockhandle',array('product'=>$product));
?>

Anyone have a solution?