There is an issue with the back in stock subscribe event having the product’s tags appended to the products’ categories. The tags field is not shown in the back in stock subscribe event.
When that subscribe event is viewed in the klaviyo profile, it shows the products tags appended to the products categories, and does not show a field “tags”. It seems when the variant is looked up from the relationship, it is incorrectly mapping the product’s tags to the end of the categories.
This prevents other functionality that uses the subscribe’s product’s tags, such as segments.
Best answer by ashley_mcdermottView original