When using the welcome message as a startpage (index.php) and placing a link from for example facebook to a e107 website not the whole index page is showed, facebook ads a fbclid query string to the url.

When using a custom page or news as a starting page there's no problem.

Example - http://fysid.nl/?/klmnbv
or http://fysid.nl/

Confirm?
Alex