Hi,
HikaShop doesn't add the Itemid parameter to these links.
You can edit the file sub_block_loing_form.php via the menu Display>Views and you'll see that these links use the code:
$reset_url = 'index.php?option=com_users&view=reset';
$remind_url = 'index.php?option=com_users&view=remind';
So that means that the Itemid parameter is added by something else on your website.
If you have a SEF extension like SH404SEF, it might come from one of its settings.
I suppose that an easy solution would be to add the &Itemid=xx parameter to the code of sub_block_loing_form.php yourself with the id of a menu item of com_users which is public. That way, it should avoid that other extension from trying to add a wrong one to it.