The AutoCart at this moment have one limit connected to a Shopify limit.

The Autocart automations are not available on the Draft Orders Checkout

Unfortunately, at the moment with Draft Orders checkout, it is not possible to retrieve the information we need to make Autocart work correctly.

We are working to implement this aspect as soon as it is possible.

You can simply identify  a Draft Order checkout by looking in the address bar and identifying the DO in it