Hi here,
I am getting the same issue, it fails for some products but works for others. It seems it’s something to do with the names? Names of products that failed:
Star Wars: Legion 2019 Ticket
Warmachine/Hordes 2019 Ticket
Any other products without special characters in the names work fine.
Although the funny thing is, if I remove the special characters from the names, it doesn’t seem to help. Going to see about changing some other things and see if I can really narrow down the problem.