Could you please check /themes/yourtheme/mails/lang/order_conf_product_list.tpl
(or if there isn't one in themes, then just /mails/lang/order_conf_product_list.tpl)
Take a look at lines 49-51, they should be:
{foreach $product['customization'] as $customization}
{$customization['customization_text']}
{/foreach}
Can you confirm that it's exactly as above without any filters/modifiers on {$customization['customization_text']} ?
Could you please check /themes/yourtheme/mails/lang/order_conf_product_list.tpl
(or if there isn't one in themes, then just /mails/lang/order_conf_product_list.tpl)
Take a look at lines 49-51, they should be:
{foreach $product['customization'] as $customization}
{$customization['customization_text']}
{/foreach}
Can you confirm that it's exactly as above without any filters/modifiers on {$customization['customization_text']} ?