Hello there,
I can see that the affiliate cookie is generated correctly, so the problem may be due to the configuration. Do you have the cookie expiration function activated? If so, I recommend a time greater than 5 minutes.
If not, it may be due to a conflict with another plugin or your theme, so I recommend performing the following tests:
- update the plugin, WC and WP to the latest version.
- change to a default WP theme like 2024.
- Leave only WC and our plugin active, and activate your plugins in batches until you find the one that conflicts.
Check it out and tell us any news.
Best regards.