[Plugin: Simple Google Connect] Odd 'state' issue

Interesting issue here:

I’m looking in the function sgc_oauth_catcher():

in sgc-base.php there is the following check
if ( !empty( $_REQUEST['state'] ) )

Now, checking the URL returned by google, there is a state=popup_profile_connect – but strangely the $_REQUEST[‘state’] is null.

If I replace the final redirect in sgc_oauth_catcher():

wp_redirect(home_url());

Which should obviously never be reached, with:

do_action('sgc_state_popup_profile_connect', $oauth );

which would be called if $_REQUEST[‘state’] wasn’t returning null it works fine.

So… any ideas why $_REQUEST[‘state’] is returning null to php when I can clearly see it in the url, and why $_REQUEST[‘code’] is returning the correct value (which is also visible in the url)?

https://www.ads-software.com/extend/plugins/simple-google-connect/