Does snipcart play nicely with google ads retargeting tags?

I am using a PMAX campaign with google shopping. The item id is patkit. It is the same both in my shopping cart and in my google merchant. When a user adds an item to cart, snip cart sends an add_to_cart event to analytics/adwords, but there seem to be a problem with the product id.

Specifically, Audience sources > Google Ads tag > Retail reports 0 Tag hits with feed key matching a servable feed item. This has been going on for more than 1 month. I have tried everything I can think of. I fear my campaign is wasting money because it is unable to properly connect merchant to remarking via max.

I am including a screenshot of what I see in my google account.

My snipcart code is:

<button type="button" class="btn btn-warning btn-raised shadow btn-sm snipcart-add-item"
        data-item-url="{{ .Page.Permalink }}"
    <span class="glyphicon glyphicon-shopping-cart"></span>
    Add Kit to Cart