Gmail annotation promo tab not showing the image - gmail-promo-tab

Question

I've been using the gmail promotab annotation for some time, it all used to work fine, however, the image stopped showing recently. It only does show the company logo, subject line, the amount of % off and the discount code, but not the image. When testing the code here: https://developers.google.com/gmail/promotab/overview the preview looks perfect, including the image and all, but in the actual Gmail promo inbox the image is not there. I am not sure how to solve this. Would it help if I send the actual email again to schema.whitelisting+sample#gmail.com?
Below is the schema code used (in the tag):
[{
"#context": "http://schema.org/",
"#type": "Organization",
"name": "XXXXXXX",
"logo": "XXXXXXX"
},{
"#context": "http://schema.org/",
"#type": "EmailMessage",
"subjectLine": "XXXXXXX"
},{
"#context": "http://schema.org/",
"#type": "DiscountOffer",
"description": "10% OFF",
"discountCode": "XXXXXXX",
"availabilityStarts": "2022-07-26T08:00:00+01:00",
"availabilityEnds": "2022-07-27T08:00:00+01:00"
},{
"#context": "http://schema.org/",
"#type": "PromotionCard",
"image": "XXXXXXX"
}]
</script> ```