Hi @emrect
Please try to add this line of code to your <head> section of the site.
<meta name="referrer" content="origin">
It may increase amount of requests with referrer header.
Keep in mind that safe browsing browsers won’t include this header, including Safari and browsers with tracker-blocker extensions.
In terms of google, you need to find out which referrer is passed to your site from Google, then you can set it in our plugin, you can do that in Google Analytics where such detail are specified.
In v1.1.8/v1.1.9 we will include option that will allow you to use Regex as referrer option, which will allow you to set wildcard referrers from single domain.
If you need further support, let me know ??
Thank you!