Hi Andy, thank you for your reply.
Yes I’m changing some other WC code as well. I came to this line because the problem was disapearing at the front end when I commented this line out.
If you want to help me further I’m happy to send you my complete child-themes functions.php file.
Perhaps it is easier to send it to you as an attachment in an email. So if you agree with it, please send me an email on which I can reply. If you want it in another way, please let me know.
Best wishes,
Adri