The cookie without chocolate is a classic, the variant with chocolate is only a 3 or 4 years old and likely always has been like this. So not shrinkflation or enshittification, just the way this product has always been.
Imo buy it without chocolate and eat it together with coffee or tea for the best result.
You could still send an email or fill in their contact form. It’s quickly done and the worst that could happen, is nothing.