Affiliate product deep links redirect to the homepage

We are integrating Card Nexus product links into TCG.Online so we can promote the marketplace. On 20 October 2026, tracked product links consistently lose the product destination.

Working direct product URL:

https://cardnexus.com/en/explore/cyberpunk/welcome-to-night-city-beta/card/gorilla-arms-251176

Reproduction:

1. Open https://af.cardnexus.link/6206910/cn/251176/Gorilla%20Arms

2. The first HTTP 302 correctly builds a go.cardnexus.link/c/6206910/3770197/48046 URL with an encoded product destination in the u parameter.

3. That tracking URL returns HTTP 302 to https://www.cardnexus.com/ instead of the product, eventually landing at https://cardnexus.com/en.

The product-specific link generated by the Impact dashboard, https://go.cardnexus.link/m43baO, does the same. Testing full tracking links with both cardnexus.com and www.cardnexus.com product destinations gives the same result. Reproduced in the browser and with public HTTP requests, independently of our app.

Your documentation describes these as tracked product links: https://docs.cardnexus.com/affiliates

Impact documents the u parameter and allowed-domain/path requirement: https://help.impact.com/partner/what-would-you-like-to-learn-about/platform-features/tracking/tracking-links/create-and-manage-links/create-a-deep-link-for-an-ad

Could you confirm the supported product affiliate URL format, check deep-link permissions/allowed destinations/redirect rules for this program, and explain how we can verify click and conversion attribution before promoting Card Nexus? We can provide the complete redirect trace privately through Impact. Thank you!

TCG.Online