I have a website that redirects to a Typeform with UTM tags, FBC, FBP, GCLID, etc as url parameters.
I don’t use an embed; I simply redirect to a Typeform link like this:
https://XXXXX.typeform.com/to/XXXX?utm_source=xxxxx&utm_medium=xxxxx&utm_campaign=xxxxx&utm_term=xxxxx&utm_content=xxxxx#gclid=xxxxx&fbclid=xxxxx&gclientid=xxxxx&fbc=xxxxx&fbp=xxxxx&referrer=xxxxx&prev_referrer=xxxxx&param1=xxxxx&param2=xxxxx&prev_url=xxxxx

I built this link using a custom JS script that retrieves values for these parameters from the URL or cookies.

Both my website and Typeform are connected to the same GA, and cross-domain tracking is enabled in the GA settings.

In some cases, I get duplicate UTM tags and for fbclid (an example is below).

What could be causing this behavior? How can I avoid duplicates?