I have the same problem and tried to open an issue seven months ago but I havent been able to make it work anyway after your suggestions. The instructions are so simple …. but no way for the customer to select the image. I also tried to buy one giftcard by myself …. and the gift card i received by email was one default image as if I did’t selected the personalized one.
If i deselect the image feature … the customer finally can see the preview with the image i uploaded (no category in this case, of couse) … but the email the recipient will receive …. is one with your default image as well. Not with the image they can see in the preview I mean.
Maybe it’s a conflict with sydney teme? or what?
Thank you