Line item widgets not rendering in top order summary on mobile on 1-page checkout

Topic summary

A line item widget added to the checkout page fails to render in the top order summary on mobile devices when using one-page checkout. The widget only appears in the bottom order summary, though it’s expected to display in both locations.

Current behavior:

  • Widget renders correctly in bottom order summary on mobile
  • Missing from top order summary on mobile
  • Desktop view appears to work correctly

Technical details:

  • Using “Checkout::Dynamic::Render” target
  • Widget is placed by users in the checkout editor

Status:

  • Issue has been previously reported and tracked on GitHub (issue #1843)
  • Users can follow the linked GitHub issue for updates on resolution
Summarized with AI on November 15. AI used: claude-sonnet-4-5-20250929.

When I add line item widget to checkout page, switch it to one-page checkout and use mobile version, it only renders on bottom order summary, but it’s expected to be in both top and bottom.

Missing from top:

Works in bottom

Hi Santoninko,

So the variant and quantity pickers should appear in both instances where products appear on the checkout - this is appearing on regualr desktop view though, correct? Are you using the purchase.checkout.cart-line-item.render-after extension target?

Hi! We’re using “Checkout::Dynamic::Render” and widget is placed by a user in checkout editor.

Hey @santoninko

Thanks for flagging this. It looks like someone else recently reported this - you can follow along here: https://github.com/Shopify/ui-extensions/issues/1483

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