Why cart/order attribute not removing when send blank value, it was before but it's not working now

Topic summary

A user reports that cart/order attributes are no longer being removed when sending blank values through the Shopify Ajax API, despite this functionality working previously.

Current Issue:

  • Sending blank values to clear cart attributes fails to remove them
  • This represents a change in behavior from earlier functionality

Response Provided:
Another user shared a link to a relevant Shopify Community thread discussing the same problem: “Removing cart attributes using Ajax API stopped working”

The discussion remains open with no resolution yet provided in this thread. The linked resource may contain additional context or potential solutions.

Summarized with AI on November 18. AI used: claude-sonnet-4-5-20250929.

Why cart/order attribute (additional detail) not being removed when sending a blank value, It was before but it’s not working now.

Re: Removing cart attributes using Ajax API stopped working - Shopify Community