No cookie created

As discussed internally. The reason was, that "Do not track" was enabled.

I sadly have to reopen this. It doesn't work. I tried in Chrome and Edge and in none of them the cookie was created or the UTM parameters were tracked on registration. All values empty.

I used ?utm_source=test-source&utm_medium=test-medium&utm_campaign=test-campaign&utm_term=test-term

No idea yet, why it doesn't work.

Okay I finally think it's a conflict with Caching and this module may never have worked on properly cached pages.
See https://www.drupal.org/project/cacheable_cookie_handling → and other documentation of this problem.

Still to be proofed and tested.

I tried using session instead and that works fine, even with caching enabled. See ✨ Add option to use other storage methods Active

Still I think we should try to understand, why cookie doesn't work and if it won't work in general.

Fixed in ✨ Add option to use other storage methods Active