Admin Link extension broken, redirects to app homepage instead of specified route

[Bill-Shopify]

We’re investigating. Here’s a link to related issue:

Admin UI block extension app: link intermittently redirects to app home (admin OAuth) instead of calling embedded app route

We’re seeing intermittent navigation issues with an Admin UI block extension that deep-links into our embedded app. The extension renders a button like: <Button variant="primary" href={`app:api/example-endpoint?resourceId=...`} > Process </Button> This setup has been running in production for around six months without any issues, and the intermittent behaviour only started in the last 24 hours without any code changes on our side. Clicking the button should navigate the merchant to our…