Deletes cookies every 5s

The code in Drupal.behaviors.eu_cookie_compliance_popup_block_cookies defines a local variable euCookieComplianceBlockCookies to store a window.setInterval reference. That interval function deletes all but whitelisted cookies every 5s.

When you click Agree, it's supposed to delete that timer. However it because the function that does that check is in a different variable scope, it doesn't work.

The result is that you click agree, a cookie is added, then at some point up to a maximum of 5s later the cookie (and others) are deleted again. And next time you load a page you'll get annoyed by seeing the banner again.

The solution seems to be simply defining the variable in a shared scope, e.g. line 3 of eu_cookie_compliance.js

var euCookieComplianceBlockCookies;

And removing the "var" keyword before its assignment in Drupal.behaviors.eu_cookie_compliance_popup_block_cookies

This is working for me.