App getting a weird redirect to force_legacy_domain=1 url when opening

Shopify Apps
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Topic summary

A developer migrated an external app to an embedded Shopify admin app and updated it in the partners dashboard. However, when opening the app from a store’s apps panel, it redirects to a URL containing force_legacy_domain=1, which opens in a new tab instead of embedding properly.

Key Issue:

  • The redirect suggests Shopify may still be treating the app as a legacy/old app despite the migration
  • The app functions correctly in the first tab but exhibits this redirect behavior on subsequent opens

Suggested Solution:

  • Another user experienced the identical issue and resolved it by contacting Shopify support
  • Support was able to remove the legacy app designation, after which the app worked correctly

Status: The issue appears to be on Shopify’s side and requires support intervention to update the app’s classification in their system.

Summarized with AI on November 9. AI used: claude-sonnet-4-5-20250929.
1

Hi!

We recently migrated an old external app to be an embedded admin app.

The migration went well and we updated it to be an embedded admin app from the app partners dashboard.

However when we try to open the app from any store apps panel we get redirected to an url of the form:

https://<store_myshopify_domain>/admin/apps/easy-reports?force_legacy_domain=1

This opens as a new tab so when we close it the app works well on the first tab.

What might be causing this weird behavior? Is this happening from the Shopify side because it’s an old (maybe marked as legacy) app?

I’ve recorded an screenshot showing the issue: https://streamable.com/psl82x

Thanks!

2

Ping support, we had the very same issue. they clicked on something and it just works. It’s a legacy app, that’s the reason

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