When the visitor id (pk_vid) is added to a link to a particular sub-domain on my site it breaks the link.
For example we send users through a proxy to authenticate access to articles, journals, etc. The sub-domain link sends the redirecting link as a url variable (https://proxying.mywebsite.edu?url=https://article-website.com). When matomo adds the pk_vid var (https://proxying.mywebsite.edu?url=https://article-website.com&pk_vid=123) the redirect fails.
I’m not concerned with tracking the user profile through to the proxying server.
How do I prevent matomo from adding the pk_vid var to just the proxying.mywebsite.edu sub-domain?
Thanks.