This issue is related to a recent change in the major browsers. Now, if no referrer policy is set for your website, browsers will use strict-origin-when-cross-origin by default. With this policy the form widget will capture only the origin (referrer website domain), not the full URL.
To fix this issue, add an .htaccess file to your website (where you have published the link to your form) with this content:
<IfModule mod_headers.c> # Allow to capture full URLs with Easy Forms widget Header always set Referrer-Policy "no-referrer-when-downgrade" </IfModule>