Error while printing PDF invoice for some customers but not for all

Hello all,

I’ve got an error with my M2 2.3.3, only for some customers, when I’m printing invoice :

[2020-05-14 18:07:50] main.ERROR: Warning: Invalid argument supplied for foreach() in /var/www/magento/vendor/magento/module-sales/Model/Order/Pdf/AbstractPdf.php on line 710 [] []

Is someone has an idea from the root cause of this bug ?